diff --git a/block/backup-top.c b/block/backup-top.c
index 818d3f26b4..b8d863ff08 100644
--- a/block/backup-top.c
+++ b/block/backup-top.c
@@ -255,9 +255,6 @@ append_failed:
 void bdrv_backup_top_drop(BlockDriverState *bs)
 {
     BDRVBackupTopState *s = bs->opaque;
-    AioContext *aio_context = bdrv_get_aio_context(bs);
-
-    aio_context_acquire(aio_context);
 
     bdrv_drained_begin(bs);
 
@@ -271,6 +268,4 @@ void bdrv_backup_top_drop(BlockDriverState *bs)
     bdrv_drained_end(bs);
 
     bdrv_unref(bs);
-
-    aio_context_release(aio_context);
 }
diff --git a/block/backup.c b/block/backup.c
index cf62b1a38c..1383e219f5 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -135,8 +135,11 @@ static void backup_abort(Job *job)
 static void backup_clean(Job *job)
 {
     BackupBlockJob *s = container_of(job, BackupBlockJob, common.job);
+    AioContext *aio_context = bdrv_get_aio_context(s->backup_top);
 
+    aio_context_acquire(aio_context);
     bdrv_backup_top_drop(s->backup_top);
+    aio_context_release(aio_context);
 }
 
 void backup_do_checkpoint(BlockJob *job, Error **errp)