diff -aur slim-1.3.2/switchuser.h slim-1.3.2.a/switchuser.h
--- slim-1.3.2/switchuser.h	2010-07-08 07:04:10.000000000 +0200
+++ slim-1.3.2.a/switchuser.h	2010-08-21 15:10:34.306212393 +0200
@@ -13,6 +13,7 @@
 #define _SWITCHUSER_H_
 
 #include <stdlib.h>
+#include <stdio.h> /* remove */
 #include <unistd.h>
 #include <string.h>
 #include <pwd.h>