1 files changed, 4 insertions, 2 deletions
diff --git a/block/mirror.c b/block/mirror.c
index 9b36391bb9..70f24d9ef6 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1755,8 +1755,10 @@ void mirror_start(const char *job_id, BlockDriverState *bs,
     bool is_none_mode;
     BlockDriverState *base;
 
-    if (mode == MIRROR_SYNC_MODE_INCREMENTAL) {
-        error_setg(errp, "Sync mode 'incremental' not supported");
+    if ((mode == MIRROR_SYNC_MODE_INCREMENTAL) ||
+        (mode == MIRROR_SYNC_MODE_BITMAP)) {
+        error_setg(errp, "Sync mode '%s' not supported",
+                   MirrorSyncMode_str(mode));
         return;
     }
     is_none_mode = mode == MIRROR_SYNC_MODE_NONE;