--- squid-3.4.4.orig/lib/rfcnb/rfcnb-io.c	2014-03-09 10:40:56.000000000 +0100
+++ squid-3.4.4/lib/rfcnb/rfcnb-io.c	2014-03-27 09:28:30.000000000 +0100
@@ -30,7 +30,7 @@
 #include "rfcnb/rfcnb-util.h"
 #include "rfcnb/std-includes.h"
 #include <sys/uio.h>
-#include <sys/signal.h>
+#include <signal.h>
 
 #if HAVE_STRING_H
 #include <string.h>