diff --git a/menu.c b/menu.c
index 3839df4..fb05798 100644
--- a/menu.c
+++ b/menu.c
@@ -1,6 +1,7 @@
 /* copyright 2013 Sascha Kruse and contributors (see LICENSE for licensing information) */
 
 #define _GNU_SOURCE
+#include <stdlib.h>
 #include <stdbool.h>
 #include <regex.h>
 #include <stdio.h>
diff --git a/notification.c b/notification.c
index 1039cb8..b170977 100644
--- a/notification.c
+++ b/notification.c
@@ -1,7 +1,7 @@
 /* copyright 2013 Sascha Kruse and contributors (see LICENSE for licensing information) */
 
 #define _GNU_SOURCE
-
+#include <stdlib.h>
 #include <time.h>
 #include <glib.h>
 #include <errno.h>