diff --git a/library/think/db/Query.php b/library/think/db/Query.php
index 93b034b6..67619109 100644
--- a/library/think/db/Query.php
+++ b/library/think/db/Query.php
@@ -2210,7 +2210,7 @@ class Query
             // 执行操作
             $result = '' == $sql ? 0 : $this->execute($sql, $bind);
             if ($result) {
-                if (isset($where[$pk])) {
+                if (is_string($pk) && isset($where[$pk])) {
                     $data[$pk] = $where[$pk];
                 } elseif (is_string($pk) && isset($key) && strpos($key, '|')) {
                     list($a, $val) = explode('|', $key);