diff --git a/usr.bin/cpp/Makefile b/usr.bin/cpp/Makefile
index 13921fa..22d49d0 100644
--- a/usr.bin/cpp/Makefile
+++ b/usr.bin/cpp/Makefile
@@ -1,5 +1,5 @@
 #
-# $Id: Makefile,v 1.1 1997/12/02 08:05:52 gdr Exp $
+# $Id: Makefile,v 1.2 1997/12/21 22:11:07 gdr Exp $
 #
 
 PROG	= cpp
@@ -9,7 +9,7 @@ SRCS	= cpp.c eval.c getopt.c hideset.c include.c lex.c macro.c nlist.c \
 STACK		= 8192
 OPTIMIZE	= 0
 DEBUG		= 25
-CFLAGS		+= -D__STACK_CHECK__
+CFLAGS		+= -DDO_SEGMENTS -D__STACK_CHECK__
 LDLIBS		+= /src/gno/lib/libc/gno/stack.o /src/gno/lib/libc/gno/stack2.o
 
 # Delivery directory