diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index fa01ab5280..6b6ff7a54b 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -3626,7 +3626,6 @@ static qemuMonitorCallbacks callbacks = {
 static void
 virQEMUCapsInitQMPBasic(virQEMUCapsPtr qemuCaps)
 {
-    virQEMUCapsSet(qemuCaps, QEMU_CAPS_FSDEV_READONLY);
     virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_COPY_ON_READ);
     virQEMUCapsSet(qemuCaps, QEMU_CAPS_FSDEV_WRITEOUT);
     virQEMUCapsSet(qemuCaps, QEMU_CAPS_DRIVE_IOTUNE);
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index a95993196b..97633b1131 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -157,7 +157,7 @@ typedef enum {
     X_QEMU_CAPS_PCI_ROMBAR, /* -device rombar=0|1 */
     QEMU_CAPS_ICH9_AHCI, /* -device ich9-ahci */
     QEMU_CAPS_NO_ACPI, /* -no-acpi */
-    QEMU_CAPS_FSDEV_READONLY, /* -fsdev readonly supported */
+    X_QEMU_CAPS_FSDEV_READONLY, /* -fsdev readonly supported */
 
     /* 80 */
     QEMU_CAPS_VIRTIO_BLK_SCSI, /* virtio-blk-pci.scsi */
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 527a35779d..8ff1d362ab 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -2371,16 +2371,8 @@ qemuBuildFSStr(virDomainFSDefPtr fs,
     virBufferAsprintf(&opt, ",id=%s%s", QEMU_FSDEV_HOST_PREFIX, fs->info.alias);
     virBufferAsprintf(&opt, ",path=%s", fs->src->path);
 
-    if (fs->readonly) {
-        if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_FSDEV_READONLY)) {
-            virBufferAddLit(&opt, ",readonly");
-        } else {
-            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                           _("readonly filesystem is not supported by this "
-                             "QEMU binary"));
-            goto error;
-        }
-    }
+    if (fs->readonly)
+        virBufferAddLit(&opt, ",readonly");
 
     if (virBufferCheckError(&opt) < 0)
         goto error;
diff --git a/tests/qemucapabilitiesdata/caps_1.5.3.x86_64.xml b/tests/qemucapabilitiesdata/caps_1.5.3.x86_64.xml
index 58208d3f3b..f9d7babc98 100644
--- a/tests/qemucapabilitiesdata/caps_1.5.3.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_1.5.3.x86_64.xml
@@ -28,7 +28,6 @@
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
   <flag name='no-acpi'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_1.6.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_1.6.0.x86_64.xml
index d6183e4009..da4cf265d4 100644
--- a/tests/qemucapabilitiesdata/caps_1.6.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_1.6.0.x86_64.xml
@@ -28,7 +28,6 @@
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
   <flag name='no-acpi'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_1.7.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_1.7.0.x86_64.xml
index 4af8078a56..cbf81f0f05 100644
--- a/tests/qemucapabilitiesdata/caps_1.7.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_1.7.0.x86_64.xml
@@ -28,7 +28,6 @@
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
   <flag name='no-acpi'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.1.1.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.1.1.x86_64.xml
index 6bd1dcfb99..306fc30895 100644
--- a/tests/qemucapabilitiesdata/caps_2.1.1.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.1.1.x86_64.xml
@@ -28,7 +28,6 @@
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
   <flag name='no-acpi'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.10.0.aarch64.xml
index ab1d635e64..d80038c4e0 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0.aarch64.xml
@@ -19,7 +19,6 @@
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
   <flag name='no-acpi'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml
index d26d716452..c8d5818761 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml
@@ -18,7 +18,6 @@
   <flag name='pci-ohci'/>
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml
index cfee4d1389..f71dfd8647 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml
@@ -9,7 +9,6 @@
   <flag name='virtio-blk-pci.ioeventfd'/>
   <flag name='virtio-blk-pci.event_idx'/>
   <flag name='virtio-net-pci.event_idx'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml
index bfd3b3c637..767fa0a42e 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml
@@ -28,7 +28,6 @@
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
   <flag name='no-acpi'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.11.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.11.0.s390x.xml
index 398a5a84cb..fd1952c3cc 100644
--- a/tests/qemucapabilitiesdata/caps_2.11.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.11.0.s390x.xml
@@ -9,7 +9,6 @@
   <flag name='virtio-blk-pci.ioeventfd'/>
   <flag name='virtio-blk-pci.event_idx'/>
   <flag name='virtio-net-pci.event_idx'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml
index c769b4b369..4f3d32abf2 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml
@@ -19,7 +19,6 @@
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
   <flag name='no-acpi'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
index 0bdaef177c..6d15fd4102 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
@@ -18,7 +18,6 @@
   <flag name='pci-ohci'/>
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml
index 2fe64a7bfd..259277ae75 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml
@@ -9,7 +9,6 @@
   <flag name='virtio-blk-pci.ioeventfd'/>
   <flag name='virtio-blk-pci.event_idx'/>
   <flag name='virtio-net-pci.event_idx'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
index f71b37cee2..e44ae68252 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
@@ -26,7 +26,6 @@
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
   <flag name='no-acpi'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml
index 8e7c2a5daf..294a110e96 100644
--- a/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml
@@ -28,7 +28,6 @@
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
   <flag name='no-acpi'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml
index 223d0a7a3c..fd95ccf560 100644
--- a/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml
@@ -28,7 +28,6 @@
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
   <flag name='no-acpi'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.6.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.6.0.aarch64.xml
index 46c006b805..dc9741e76f 100644
--- a/tests/qemucapabilitiesdata/caps_2.6.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.6.0.aarch64.xml
@@ -21,7 +21,6 @@
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
   <flag name='no-acpi'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.6.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.6.0.ppc64.xml
index 6c7799924d..71d3ab282b 100644
--- a/tests/qemucapabilitiesdata/caps_2.6.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.6.0.ppc64.xml
@@ -18,7 +18,6 @@
   <flag name='pci-ohci'/>
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml
index 720e84b47e..cd1bb4d709 100644
--- a/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml
@@ -28,7 +28,6 @@
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
   <flag name='no-acpi'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.7.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.7.0.s390x.xml
index 8e2e796b28..b0be73ce54 100644
--- a/tests/qemucapabilitiesdata/caps_2.7.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.7.0.s390x.xml
@@ -9,7 +9,6 @@
   <flag name='virtio-blk-pci.ioeventfd'/>
   <flag name='virtio-blk-pci.event_idx'/>
   <flag name='virtio-net-pci.event_idx'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.7.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.7.0.x86_64.xml
index c900360c07..6c135ab275 100644
--- a/tests/qemucapabilitiesdata/caps_2.7.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.7.0.x86_64.xml
@@ -28,7 +28,6 @@
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
   <flag name='no-acpi'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.8.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.8.0.s390x.xml
index 44957621b5..85b57d9c3a 100644
--- a/tests/qemucapabilitiesdata/caps_2.8.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.8.0.s390x.xml
@@ -9,7 +9,6 @@
   <flag name='virtio-blk-pci.ioeventfd'/>
   <flag name='virtio-blk-pci.event_idx'/>
   <flag name='virtio-net-pci.event_idx'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml
index a32a10cfb2..f362433d0f 100644
--- a/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml
@@ -28,7 +28,6 @@
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
   <flag name='no-acpi'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml
index db61974e6b..d78567689f 100644
--- a/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml
@@ -18,7 +18,6 @@
   <flag name='pci-ohci'/>
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.9.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.9.0.s390x.xml
index da8b39dc20..e585940edc 100644
--- a/tests/qemucapabilitiesdata/caps_2.9.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.9.0.s390x.xml
@@ -9,7 +9,6 @@
   <flag name='virtio-blk-pci.ioeventfd'/>
   <flag name='virtio-blk-pci.event_idx'/>
   <flag name='virtio-net-pci.event_idx'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml
index 5697923c3e..9e97990752 100644
--- a/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml
@@ -28,7 +28,6 @@
   <flag name='usb-hub'/>
   <flag name='ich9-ahci'/>
   <flag name='no-acpi'/>
-  <flag name='fsdev-readonly'/>
   <flag name='virtio-blk-pci.scsi'/>
   <flag name='drive-copy-on-read'/>
   <flag name='fsdev-writeout'/>