--- mutter-3.20.3/src/core/startup-notification.c.orig	2016-07-08 23:09:06.728564374 +0200
+++ mutter-3.20.3/src/core/startup-notification.c	2016-07-08 23:09:56.925482612 +0200
@@ -418,7 +418,7 @@
   elapsed = ctod->now - timestamp;
 
   meta_topic (META_DEBUG_STARTUP,
-              "Sequence used %ld ms vs. %d max: %s\n",
+              "Sequence used %lld ms vs. %d max: %s\n",
               elapsed, STARTUP_TIMEOUT,
               meta_startup_notification_sequence_get_id (sequence));