diff --git a/ext/mysqlnd/mysqlnd_statistics.c b/ext/mysqlnd/mysqlnd_statistics.c
index 8b8eef6e72c..a664f9b5789 100644
--- a/ext/mysqlnd/mysqlnd_statistics.c
+++ b/ext/mysqlnd/mysqlnd_statistics.c
@@ -206,7 +206,7 @@ mysqlnd_fill_stats_hash(const MYSQLND_STATS * const stats, const MYSQLND_STRING
 		char tmp[25];
 
 		sprintf((char *)&tmp, MYSQLND_LLU_SPEC, stats->values[i]);
-		add_assoc_string_ex(return_value, names[i].s, names[i].l + 1, tmp);
+		add_assoc_string_ex(return_value, names[i].s, names[i].l, tmp);
 	}
 }
 /* }}} */