diff --git a/drivers/net/ppp/ppp_synctty.c b/drivers/net/ppp/ppp_synctty.c
index 644e99fc3..7837b9b46 100644
--- a/drivers/net/ppp/ppp_synctty.c
+++ b/drivers/net/ppp/ppp_synctty.c
@@ -47,6 +47,7 @@
 #include <linux/uaccess.h>
 
 #define PPP_VERSION	"2.4.2"
+#define PPP_LCP		0xc021	/* Link Control Protocol */
 
 /* Structure for storing local state. */
 struct syncppp {