--- a/dwm.c	Fri Dec 12 19:55:03 2008 +0000
+++ b/dwm.c	Sat Dec 13 16:35:34 2008 +0000
@@ -27,6 +27,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <sys/signal.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <X11/cursorfont.h>