diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 4d7008396e..5ba3519386 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -557,6 +557,7 @@ VIR_ENUM_IMPL(virQEMUCaps,
 
               /* 350 */
               "i8042",
+              "rng-builtin",
     );
 
 
@@ -1272,6 +1273,7 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = {
     { "ramfb", QEMU_CAPS_DEVICE_RAMFB },
     { "max-arm-cpu", QEMU_CAPS_ARM_MAX_CPU },
     { "i8042", QEMU_CAPS_DEVICE_I8042 },
+    { "rng-builtin", QEMU_CAPS_OBJECT_RNG_BUILTIN },
 };
 
 static struct virQEMUCapsStringFlags virQEMUCapsDevicePropsVirtioBalloon[] = {
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index e110805456..ca7612ebfc 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -538,6 +538,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
 
     /* 350 */
     QEMU_CAPS_DEVICE_I8042, /* PS/2 controller */
+    QEMU_CAPS_OBJECT_RNG_BUILTIN, /* -object rng-builtin */
 
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;
diff --git a/tests/qemucapabilitiesdata/caps_4.2.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_4.2.0.aarch64.xml
index 184bb7ff77..ab81854e62 100644
--- a/tests/qemucapabilitiesdata/caps_4.2.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_4.2.0.aarch64.xml
@@ -176,6 +176,7 @@
   <flag name='savevm-monitor-nodes'/>
   <flag name='drive-nvme'/>
   <flag name='smp-dies'/>
+  <flag name='rng-builtin'/>
   <version>4001050</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>61700242</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_4.2.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_4.2.0.ppc64.xml
index cbd082b683..0da578572b 100644
--- a/tests/qemucapabilitiesdata/caps_4.2.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_4.2.0.ppc64.xml
@@ -178,6 +178,7 @@
   <flag name='drive-nvme'/>
   <flag name='smp-dies'/>
   <flag name='i8042'/>
+  <flag name='rng-builtin'/>
   <version>4001050</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>42900242</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_4.2.0.s390x.xml b/tests/qemucapabilitiesdata/caps_4.2.0.s390x.xml
index c8746f05ef..9275bf36fa 100644
--- a/tests/qemucapabilitiesdata/caps_4.2.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_4.2.0.s390x.xml
@@ -136,6 +136,7 @@
   <flag name='blockdev-file-dynamic-auto-read-only'/>
   <flag name='drive-nvme'/>
   <flag name='smp-dies'/>
+  <flag name='rng-builtin'/>
   <version>4001050</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>39100242</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_4.2.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_4.2.0.x86_64.xml
index c41df184be..0361ed5bdb 100644
--- a/tests/qemucapabilitiesdata/caps_4.2.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_4.2.0.x86_64.xml
@@ -220,6 +220,7 @@
   <flag name='drive-nvme'/>
   <flag name='smp-dies'/>
   <flag name='i8042'/>
+  <flag name='rng-builtin'/>
   <version>4002000</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>43100242</microcodeVersion>