diff --git a/block.c b/block.c
index fe74ddd..2b72a0f 100644
--- a/block.c
+++ b/block.c
@@ -4083,11 +4083,13 @@
 }
 
 void *block_job_create(const BlockJobType *job_type, BlockDriverState *bs,
-                       BlockDriverCompletionFunc *cb, void *opaque)
+                       BlockDriverCompletionFunc *cb, void *opaque,
+                       Error **errp)
 {
     BlockJob *job;
 
     if (bs->job || bdrv_in_use(bs)) {
+        error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
         return NULL;
     }
     bdrv_set_in_use(bs, 1);