diff --git a/src/Illuminate/Mail/Mailer.php b/src/Illuminate/Mail/Mailer.php
index 01a32bded0a8..be0851194541 100755
--- a/src/Illuminate/Mail/Mailer.php
+++ b/src/Illuminate/Mail/Mailer.php
@@ -331,7 +331,7 @@ protected function addContent($message, $view, $plain, $raw, $data)
         if (isset($plain)) {
             $method = isset($view) ? 'addPart' : 'setBody';
 
-            $message->$method($this->renderView($plain, $data), 'text/plain');
+            $message->$method($this->renderView($plain, $data) ?: ' ', 'text/plain');
         }
 
         if (isset($raw)) {