diff --git a/bin/ed/Makefile b/bin/ed/Makefile
index a48b0d20fd85..77020043e89a 100644
--- a/bin/ed/Makefile
+++ b/bin/ed/Makefile
@@ -1,7 +1,14 @@
 PROG=	ed
-CFLAGS+=-I${.CURDIR} -DVI_BANG -DDES -DGNU_REGEX -DHAVE_STRING_H=1
+CFLAGS+=-I${.CURDIR} -DVI_BANG -DGNU_REGEX -DHAVE_STRING_H=1
 SRCS=	ed.c re.c buf.c cbc.c regex.c
 LINKS=	${BINDIR}/ed ${BINDIR}/red
 MLINKS=	ed.1 red.1
 
+.if exists(/usr/lib/libcrypt.a)
+CFLAGS+=-DDES
+DPADD+= ${LIBCRYPT}
+LDADD+= -lcrypt
+.endif
+
+
 .include <bsd.prog.mk>