diff --git a/block.c b/block.c
index e9f40dc768..eb8158ac33 100644
--- a/block.c
+++ b/block.c
@@ -2683,12 +2683,12 @@ BlockDriverState *bdrv_lookup_bs(const char *device,
         blk = blk_by_name(device);
 
         if (blk) {
-            if (!blk_bs(blk)) {
+            bs = blk_bs(blk);
+            if (!bs) {
                 error_setg(errp, "Device '%s' has no medium", device);
-                return NULL;
             }
 
-            return blk_bs(blk);
+            return bs;
         }
     }