diff --git a/src/Illuminate/Console/Parser.php b/src/Illuminate/Console/Parser.php
index 5c1e92fcf6d0..92753119f613 100644
--- a/src/Illuminate/Console/Parser.php
+++ b/src/Illuminate/Console/Parser.php
@@ -141,6 +141,6 @@ protected static function extractDescription($token)
     {
         $parts = preg_split('/\s+:\s+/', trim($token), 2);
 
-        return count($parts) === 2 ? $parts : [$token, null];
+        return count($parts) === 2 ? $parts : [$token, ''];
     }
 }