diff --git a/src/Monolog/Handler/StreamHandler.php b/src/Monolog/Handler/StreamHandler.php
index a35b7e4c..27d90e06 100644
--- a/src/Monolog/Handler/StreamHandler.php
+++ b/src/Monolog/Handler/StreamHandler.php
@@ -63,6 +63,7 @@ class StreamHandler extends AbstractProcessingHandler
             fclose($this->stream);
         }
         $this->stream = null;
+        $this->dirCreated = null;
     }
 
     /**