diff --git a/lib/Minz/Log.php b/lib/Minz/Log.php
index 5e7831cdb50..a8dbf835095 100644
--- a/lib/Minz/Log.php
+++ b/lib/Minz/Log.php
@@ -98,6 +98,7 @@ protected static function ensureMaxLogSize($file_name) {
 				rewind($fp);
 				ftruncate($fp, 0);
 				fwrite($fp, $content ? $content : '');
+				fwrite($fp, sprintf("[%s] [notice] --- Log rotate.\n", date('r')));
 				fflush($fp);
 				flock($fp, LOCK_UN);
 			} else {