--- Widgets/regexp.c.orig	Wed Apr  6 18:07:43 1994
+++ Widgets/regexp.c	Wed Mar 16 19:24:55 2016
@@ -28,6 +28,8 @@
  * regular-expression syntax might require a total rethink.
  */
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include "regexp.h"
 #include "regmagic.h"
 
@@ -199,7 +201,6 @@ char *exp;
 	register char *longest;
 	register int len;
 	int flags;
-	extern char *malloc();
 
 	if (exp == NULL)
 		FAIL("NULL argument");