diff --git a/modules/cluster/mod_heartmonitor.c b/modules/cluster/mod_heartmonitor.c
index cd07de6a8e..588e393c59 100644
--- a/modules/cluster/mod_heartmonitor.c
+++ b/modules/cluster/mod_heartmonitor.c
@@ -329,7 +329,7 @@ static void *hm_worker(apr_thread_t *thd, void *data)
 
         now = apr_time_now();
 
-        if (apr_time_sec((now - last)) > HN_UPDATE_SECONDS) {
+        if (apr_time_sec((now - last)) > HN_UPDATE_SEC) {
             hm_update_stats(ctx, p);
             apr_pool_clear(p);
             last = now;