diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 8ef2947061..e101f2f07e 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -10379,9 +10379,7 @@ qemuDomainDetermineDiskChain(virQEMUDriverPtr driver,
             return -1;
 
         qemuDomainPrepareStorageSourceConfig(n, cfg, priv->qemuCaps);
-
-        if (qemuDomainPrepareDiskSourceData(disk, n) < 0)
-            return -1;
+        qemuDomainPrepareDiskSourceData(disk, n);
 
         if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKDEV) &&
             qemuDomainPrepareStorageSourceBlockdev(disk, n, priv, cfg) < 0)
@@ -15080,7 +15078,7 @@ qemuDomainCheckCCWS390AddressSupport(const virDomainDef *def,
  * chain. This function should be also called for detected backing chain
  * members.
  */
-int
+void
 qemuDomainPrepareDiskSourceData(virDomainDiskDefPtr disk,
                                 virStorageSourcePtr src)
 {
@@ -15095,8 +15093,6 @@ qemuDomainPrepareDiskSourceData(virDomainDiskDefPtr disk,
 
     if (disk->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY)
         src->floppyimg = true;
-
-    return 0;
 }
 
 
@@ -15148,9 +15144,7 @@ qemuDomainPrepareDiskSourceLegacy(virDomainDiskDefPtr disk,
         return -1;
 
     qemuDomainPrepareStorageSourceConfig(disk->src, cfg, priv->qemuCaps);
-
-    if (qemuDomainPrepareDiskSourceData(disk, disk->src) < 0)
-        return -1;
+    qemuDomainPrepareDiskSourceData(disk, disk->src);
 
     if (qemuDomainSecretStorageSourcePrepare(priv, disk->src,
                                              disk->info.alias,
@@ -15184,9 +15178,7 @@ qemuDomainPrepareStorageSourceBlockdev(virDomainDiskDefPtr disk,
         return -1;
 
     qemuDomainPrepareStorageSourceConfig(src, cfg, priv->qemuCaps);
-
-    if (qemuDomainPrepareDiskSourceData(disk, src) < 0)
-        return -1;
+    qemuDomainPrepareDiskSourceData(disk, src);
 
     if (qemuDomainSecretStorageSourcePrepare(priv, src,
                                              src->nodestorage,
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index 796911c197..b23912ee98 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -1169,10 +1169,9 @@ qemuDomainCheckCCWS390AddressSupport(const virDomainDef *def,
                                      virQEMUCapsPtr qemuCaps,
                                      const char *devicename);
 
-int
+void
 qemuDomainPrepareDiskSourceData(virDomainDiskDefPtr disk,
-                                virStorageSourcePtr src)
-    G_GNUC_WARN_UNUSED_RESULT;
+                                virStorageSourcePtr src);
 
 
 int
diff --git a/tests/qemublocktest.c b/tests/qemublocktest.c
index e277744b06..5f89d73c72 100644
--- a/tests/qemublocktest.c
+++ b/tests/qemublocktest.c
@@ -222,8 +222,7 @@ testQemuDiskXMLToProps(const void *opaque)
         if (qemuDomainValidateStorageSource(n, data->qemuCaps) < 0)
             goto cleanup;
 
-        if (qemuDomainPrepareDiskSourceData(disk, n) < 0)
-            goto cleanup;
+        qemuDomainPrepareDiskSourceData(disk, n);
 
         if (!(formatProps = qemuBlockStorageSourceGetBlockdevProps(n, n->backingStore)) ||
             !(storageSrcOnlyProps = qemuBlockStorageSourceGetBackendProps(n, false, true, true)) ||