diff --git a/fastboot/engine.c b/fastboot/engine.c
index 345577d..89cff3f 100644
--- a/fastboot/engine.c
+++ b/fastboot/engine.c
@@ -480,6 +480,8 @@
     int status = 0;
 
     a = action_list;
+    if (!a)
+        return status;
     resp[FB_RESPONSE_SZ] = 0;
 
     double start = -1;
@@ -516,3 +518,8 @@
     fprintf(stderr,"finished. total time: %.3fs\n", (now() - start));
     return status;
 }
+
+int fb_queue_is_empty(void)
+{
+    return (action_list == NULL);
+}