diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 2d826927a3bf..cd3a0659cc07 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -2029,8 +2029,10 @@ int bitmap_resize(struct bitmap *bitmap, sector_t blocks,
 					   !bitmap->mddev->bitmap_info.external,
 					   mddev_is_clustered(bitmap->mddev)
 					   ? bitmap->cluster_slot : 0);
-	if (ret)
+	if (ret) {
+		bitmap_file_unmap(&store);
 		goto err;
+	}
 
 	pages = DIV_ROUND_UP(chunks, PAGE_COUNTER_RATIO);