diff --git a/lib/ConvertApi/ResultFile.php b/lib/ConvertApi/ResultFile.php
index e84ec62..9ac2be6 100644
--- a/lib/ConvertApi/ResultFile.php
+++ b/lib/ConvertApi/ResultFile.php
@@ -36,7 +36,7 @@ function getFileSize()
     }
 
     /**
-     * @return string Converted file contents
+     * @return false|string Converted file contents
      */
     function getContents()
     {
@@ -57,4 +57,4 @@ function save($path)
 
         return ConvertApi::client()->download($this->getUrl(), $path);
     }
-}
\ No newline at end of file
+}