diff --git a/src/resolvers.c b/src/resolvers.c
index 47b0cce44..640c9c281 100644
--- a/src/resolvers.c
+++ b/src/resolvers.c
@@ -3919,8 +3919,12 @@ static int rslv_promex_metric_info(unsigned int id, struct promex_metric *metric
 
 static void *rslv_promex_start_ts(void *unused, unsigned int id)
 {
-	struct resolvers *resolver = LIST_NEXT(&sec_resolvers, struct resolvers *, list);
+	struct resolvers *resolver;
 
+	if (LIST_ISEMPTY(&sec_resolvers))
+		return NULL;
+
+	resolver = LIST_NEXT(&sec_resolvers, struct resolvers *, list);
 	return LIST_NEXT(&resolver->nameservers, struct dns_nameserver *, list);
 }