diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 5ddd855750..442b218601 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -889,7 +889,7 @@ qemuMonitorJSONHandleBlockJobImpl(qemuMonitorPtr mon,
     case VIR_DOMAIN_BLOCK_JOB_COMPLETED:
         error = virJSONValueObjectGetString(data, "error");
         /* Make sure the whole device has been processed */
-        if (offset != len)
+        if (offset != len || error)
             event = VIR_DOMAIN_BLOCK_JOB_FAILED;
         break;
     case VIR_DOMAIN_BLOCK_JOB_CANCELED: