diff --git a/src/qemu/qemu_alias.c b/src/qemu/qemu_alias.c
index 737fc2fda8f6ec7a9b93962bdc9ce8ad5bb6e3be..65b22d36c1deaaee24051230929fcce4161aeb87 100644
--- a/src/qemu/qemu_alias.c
+++ b/src/qemu/qemu_alias.c
@@ -523,7 +523,7 @@ qemuAssignDeviceAliases(virDomainDefPtr def, virQEMUCapsPtr qemuCaps)
             return -1;
     }
     for (i = 0; i < def->nrngs; i++) {
-        if (virAsprintf(&def->rngs[i]->info.alias, "rng%zu", i) < 0)
+        if (qemuAssignDeviceRNGAlias(def, def->rngs[i]) < 0)
             return -1;
     }
     if (def->tpm) {