diff --git a/migration/ram.c b/migration/ram.c
index a975c5a..50df1e9 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -1066,14 +1066,14 @@
     trace_migration_bitmap_sync_start();
     memory_global_dirty_log_sync(last_stage);
 
-    qemu_mutex_lock(&rs->bitmap_mutex);
-    WITH_RCU_READ_LOCK_GUARD() {
-        RAMBLOCK_FOREACH_NOT_IGNORED(block) {
-            ramblock_sync_dirty_bitmap(rs, block);
+    WITH_QEMU_LOCK_GUARD(&rs->bitmap_mutex) {
+        WITH_RCU_READ_LOCK_GUARD() {
+            RAMBLOCK_FOREACH_NOT_IGNORED(block) {
+                ramblock_sync_dirty_bitmap(rs, block);
+            }
+            stat64_set(&mig_stats.dirty_bytes_last_sync, ram_bytes_remaining());
         }
-        stat64_set(&mig_stats.dirty_bytes_last_sync, ram_bytes_remaining());
     }
-    qemu_mutex_unlock(&rs->bitmap_mutex);
 
     memory_global_after_dirty_log_sync();
     trace_migration_bitmap_sync_end(rs->num_dirty_pages_period);