diff --git a/ext/mysqlnd/mysqlnd_statistics.c b/ext/mysqlnd/mysqlnd_statistics.c
index 3924c166ec9..e52414b3e8c 100644
--- a/ext/mysqlnd/mysqlnd_statistics.c
+++ b/ext/mysqlnd/mysqlnd_statistics.c
@@ -290,7 +290,7 @@ mysqlnd_stats_reset_triggers(MYSQLND_STATS * const stats TSRMLS_DC)
 	DBG_ENTER("mysqlnd_stats_reset_trigger");
 	if (stats) {
 		MYSQLND_STATS_LOCK(stats);
-		memset(stats->triggers, 0, STAT_LAST * sizeof(mysqlnd_stat_trigger));
+		memset(stats->triggers, 0, stats->count * sizeof(mysqlnd_stat_trigger));
 		MYSQLND_STATS_UNLOCK(stats);
 	}
 	DBG_RETURN(ret);