diff --git a/src/think/db/Driver.php b/src/think/db/Driver.php
index cb5fed7..0462440 100644
--- a/src/think/db/Driver.php
+++ b/src/think/db/Driver.php
@@ -982,7 +982,7 @@ protected function parseComment($comment)
      */
     protected function parseHint($hint)
     {
-        return !empty($hint) ? ' /*' . $hint . '*/' : '';
+        return !empty($hint) ? '/*' . $hint . '*/' : '';
     }
 
     /**