diff --git a/miniupnpd/netfilter_nft/nftnlrdr_misc.c b/miniupnpd/netfilter_nft/nftnlrdr_misc.c
index 373a30e..654f19d 100644
--- a/miniupnpd/netfilter_nft/nftnlrdr_misc.c
+++ b/miniupnpd/netfilter_nft/nftnlrdr_misc.c
@@ -569,31 +569,37 @@ table_cb(const struct nlmsghdr *nlh, void *data)
 	return result;
 }
 
-void
+int
 refresh_nft_cache_filter(void)
 {
 	if (rule_list_filter_validate != RULE_CACHE_VALID) {
-		refresh_nft_cache(&head_filter, nft_table, nft_forward_chain, NFPROTO_INET);
+		if (refresh_nft_cache(&head_filter, nft_table, nft_forward_chain, NFPROTO_INET) < 0)
+			return -1;
 		rule_list_filter_validate = RULE_CACHE_VALID;
 	}
+	return 0;
 }
 
-void
+int
 refresh_nft_cache_peer(void)
 {
 	if (rule_list_peer_validate != RULE_CACHE_VALID) {
-		refresh_nft_cache(&head_peer, nft_table, nft_postrouting_chain, NFPROTO_IPV4);
+		if (refresh_nft_cache(&head_peer, nft_table, nft_postrouting_chain, NFPROTO_IPV4) < 0)
+			return -1;
 		rule_list_peer_validate = RULE_CACHE_VALID;
 	}
+	return 0;
 }
 
-void
+int
 refresh_nft_cache_redirect(void)
 {
 	if (rule_list_redirect_validate != RULE_CACHE_VALID) {
-		refresh_nft_cache(&head_redirect, nft_table, nft_prerouting_chain, NFPROTO_IPV4);
+		if (refresh_nft_cache(&head_redirect, nft_table, nft_prerouting_chain, NFPROTO_IPV4) < 0)
+			return -1;
 		rule_list_redirect_validate = RULE_CACHE_VALID;
 	}
+	return 0;
 }
 
 void
diff --git a/miniupnpd/netfilter_nft/nftnlrdr_misc.h b/miniupnpd/netfilter_nft/nftnlrdr_misc.h
index dbb168f..b00a127 100644
--- a/miniupnpd/netfilter_nft/nftnlrdr_misc.h
+++ b/miniupnpd/netfilter_nft/nftnlrdr_misc.h
@@ -134,10 +134,10 @@ rule_set_filter_common(struct nftnl_rule *r, uint8_t family, const char * ifname
 		uint8_t proto, unsigned short eport, unsigned short iport, 
 		unsigned short rport, const char *descr, const char *handle);
 struct nftnl_rule *rule_del_handle(rule_t *r);
-void refresh_nft_cache_filter(void);
-void refresh_nft_cache_redirect(void);
-void refresh_nft_cache_peer(void);
-void refresh_nft_cache(struct rule_list *head, const char *table, const char *chain, uint32_t family);
+int refresh_nft_cache_filter(void);
+int refresh_nft_cache_redirect(void);
+int refresh_nft_cache_peer(void);
+int refresh_nft_cache(struct rule_list *head, const char *table, const char *chain, uint32_t family);
 
 int
 table_op(enum nf_tables_msg_types op, uint16_t family, const char * name);