diff --git a/usr.sbin/ppp/Makefile b/usr.sbin/ppp/Makefile
index 1dcd3b571a05..540eb45f4522 100644
--- a/usr.sbin/ppp/Makefile
+++ b/usr.sbin/ppp/Makefile
@@ -107,6 +107,7 @@ SRCS+=	netgraph.c
 
 .if defined(PPP_NO_PAM)
 CFLAGS+=-DNOPAM
+LIBADD+=	crypt
 .else
 LIBADD+=	pam
 .endif