diff --git a/sbin/pfctl/pfctl_radix.c b/sbin/pfctl/pfctl_radix.c
--- a/sbin/pfctl/pfctl_radix.c
+++ b/sbin/pfctl/pfctl_radix.c
@@ -56,7 +56,7 @@
 
 extern int dev;
 
-static int	 pfr_next_token(char buf[], FILE *);
+static int	 pfr_next_token(char buf[BUF_SIZE], FILE *);
 
 static void
 pfr_report_error(struct pfr_table *tbl, struct pfioc_table *io,