diff --git a/glib/gbitlock.c b/glib/gbitlock.c
index a7d335cc1..a4acdfb4b 100644
--- a/glib/gbitlock.c
+++ b/glib/gbitlock.c
@@ -26,6 +26,7 @@
 #include <glib/gatomic.h>
 #include <glib/gslist.h>
 #include <glib/gthread.h>
+#include <glib/gslice.h>
 
 #include "gthreadprivate.h"
 #include "config.h"