--- a/tag.c	Tue Feb 20 10:49:53 2007 +0100
+++ b/tag.c	Tue Feb 20 11:26:16 2007 +0100
@@ -4,6 +4,7 @@
 #include "dwm.h"
 #include <regex.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <X11/Xutil.h>
 
 /* static */