diff --git a/gnu/usr.bin/awk/Makefile b/gnu/usr.bin/awk/Makefile
index 57b631ac56ec..4790fc66d082 100644
--- a/gnu/usr.bin/awk/Makefile
+++ b/gnu/usr.bin/awk/Makefile
@@ -1,6 +1,6 @@
 # Makefile copyright James Raynard (jraynard@freebsd.org) 1997
 #
-# $Id: Makefile,v 1.7 1997/10/14 18:32:33 jraynard Exp $
+# $Id: Makefile,v 1.8 1997/10/15 14:01:31 ache Exp $
 
 .include "${.CURDIR}/../Makefile.inc"
 
@@ -13,6 +13,9 @@ MAN1=	doc/awk.1
 
 YACC = bison -y
 
+# Important for ctype macros!
+CFLAGS+=        -funsigned-char
+
 CFLAGS+=	-I${.CURDIR} -I${.CURDIR}/../../../contrib/awk
 CFLAGS+=	-DHAVE_CONFIG_H -DGAWK -DDEFPATH=\".\"
 CLEANFILES	+=awktab.c y.output y.tab.h