diff --git a/library/think/db/Query.php b/library/think/db/Query.php
index 2f37c000..7bc75c3d 100644
--- a/library/think/db/Query.php
+++ b/library/think/db/Query.php
@@ -1556,7 +1556,7 @@ class Query
      */
     protected function getFieldBindType($type)
     {
-        if (preg_match('/(int|double|float|decimal|real|numeric|serial)/is', $type)) {
+        if (preg_match('/(int|double|float|decimal|real|numeric|serial|bit)/is', $type)) {
             $bind = PDO::PARAM_INT;
         } elseif (preg_match('/bool/is', $type)) {
             $bind = PDO::PARAM_BOOL;