diff --git a/glib/gwakeup.c b/glib/gwakeup.c
index 582b2aa34..24d85b669 100644
--- a/glib/gwakeup.c
+++ b/glib/gwakeup.c
@@ -21,6 +21,7 @@
 
 #include "config.h"
 
+#include <stdint.h>
 
 /* gwakeup.c is special -- GIO and some test cases include it.  As such,
  * it cannot include other glib headers without triggering the single