diff --git a/src/Monolog/Handler/StreamHandler.php b/src/Monolog/Handler/StreamHandler.php
index 791e3b60..13361c88 100644
--- a/src/Monolog/Handler/StreamHandler.php
+++ b/src/Monolog/Handler/StreamHandler.php
@@ -169,7 +169,7 @@ class StreamHandler extends AbstractProcessingHandler
             set_error_handler([$this, 'customErrorHandler']);
             $status = mkdir($dir, 0777, true);
             restore_error_handler();
-            if (false === $status) {
+            if (false === $status && !is_dir($dir)) {
                 throw new \UnexpectedValueException(sprintf('There is no existing directory at "%s" and its not buildable: '.$this->errorMessage, $dir));
             }
         }