diff --git a/System/Error/Logger.php b/System/Error/Logger.php
index f04bc5d2..39c28811 100644
--- a/System/Error/Logger.php
+++ b/System/Error/Logger.php
@@ -167,7 +167,7 @@ class Logger extends Component
 		if (!isset($this->sources[$to_day])) $this->sources[$to_day] = [];
 
 		$fileName = storage('server-' . $to_day . '.log', $dirName = 'log/' . ($method ?? 'app'));
-		if (!isset($this->sources[$to_day][$fileName])) {
+		if (!isset($this->sources[$to_day][$fileName]) || !is_writeable($fileName)) {
 			$this->sources[$to_day][$fileName] = fopen($fileName, 'rw');
 		}
 		fwrite($this->sources[$to_day][$fileName], '[' . date('Y-m-d H:i:s') . ']:' . PHP_EOL . $messages . PHP_EOL);