diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 3005790225..b0c0e1a19b 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -12032,20 +12032,6 @@ qemuDomainDiskChangeSupported(virDomainDiskDefPtr disk,
 }
 
 
-/* Return the format node name for a given disk of an online guest */
-const char *
-qemuDomainDiskNodeFormatLookup(virDomainObjPtr vm,
-                               const char *disk)
-{
-    size_t i;
-
-    for (i = 0; i < vm->def->ndisks; i++) {
-        if (STREQ(vm->def->disks[i]->dst, disk))
-            return vm->def->disks[i]->src->nodeformat;
-    }
-    return NULL;
-}
-
 bool
 qemuDomainDiskBlockJobIsActive(virDomainDiskDefPtr disk)
 {
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index c8bf621c61..c581b3a162 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -858,9 +858,6 @@ int qemuDomainDetermineDiskChain(virQEMUDriverPtr driver,
 bool qemuDomainDiskChangeSupported(virDomainDiskDefPtr disk,
                                    virDomainDiskDefPtr orig_disk);
 
-const char *qemuDomainDiskNodeFormatLookup(virDomainObjPtr vm,
-                                           const char *disk);
-
 void qemuDomainGetImageIds(virQEMUDriverConfigPtr cfg,
                            virDomainObjPtr vm,
                            virStorageSourcePtr src,