Index: head/usr.sbin/pmcstudy/Makefile
===================================================================
--- head/usr.sbin/pmcstudy/Makefile	(revision 351497)
+++ head/usr.sbin/pmcstudy/Makefile	(revision 351498)
@@ -1,12 +1,12 @@
 #	@(#)Makefile	8.1 (Berkeley) 6/9/93
 # $FreeBSD$
 
 PROG=	pmcstudy
 MAN=	pmcstudy.8
 SRCS= pmcstudy.c eval_expr.c
-CFLAGS+= -Wall -Werror
+CFLAGS+= -Wall ${WERROR}
 
 BINDIR= /usr/bin
 
 .include <bsd.prog.mk>