diff --git a/includes/dhctoken.h b/includes/dhctoken.h
index 04bc42e1..3c770453 100644
--- a/includes/dhctoken.h
+++ b/includes/dhctoken.h
@@ -175,6 +175,7 @@ enum dhcp_token {
 	TEXT = 395,
 	STRING_TOKEN = 396,
 	SPACE = 397,
+	CONCAT = 398,
 };
 
 #define is_identifier(x)	((x) >= FIRST_TOKEN &&	\