diff --git a/sbin/pfctl/parse.y b/sbin/pfctl/parse.y
--- a/sbin/pfctl/parse.y
+++ b/sbin/pfctl/parse.y
@@ -3572,11 +3572,13 @@
 
 host_list	: ipspec optnl			{ $$ = $1; }
 		| host_list comma ipspec optnl	{
-			if ($3 == NULL)
+			if ($1 == NULL) {
+				freehostlist($3);
 				$$ = $1;
-			else if ($1 == NULL)
+			} else if ($3 == NULL) {
+				freehostlist($1);
 				$$ = $3;
-			else {
+			} else {
 				$1->tail->next = $3;
 				$1->tail = $3->tail;
 				$$ = $1;
@@ -6270,6 +6272,12 @@
 		return (0);
 }
 
+void
+freehostlist(struct node_host *h)
+{
+	FREE_LIST(struct node_host, h);
+}
+
 #undef FREE_LIST
 #undef LOOP_THROUGH
 
diff --git a/sbin/pfctl/pfctl_parser.h b/sbin/pfctl/pfctl_parser.h
--- a/sbin/pfctl/pfctl_parser.h
+++ b/sbin/pfctl/pfctl_parser.h
@@ -137,6 +137,8 @@
 	struct node_host	*tail;
 };
 
+void	freehostlist(struct node_host *);
+
 struct node_mac {
 	u_int8_t	 mac[ETHER_ADDR_LEN];
 	u_int8_t	 mask[ETHER_ADDR_LEN];