diff --git a/library/think/db/Builder.php b/library/think/db/Builder.php
index fa66e06e..0e8a3c45 100644
--- a/library/think/db/Builder.php
+++ b/library/think/db/Builder.php
@@ -121,7 +121,7 @@ abstract class Builder
                         $result[$item] = $item . '-' . floatval($val[1]);
                         break;
                     default:
-                        throw new Exception('not support data :[' . $val[0] . ']');
+                        throw new Exception('not support data:[' . $val[0] . ']');
                 }
             } elseif (is_scalar($val)) {
                 // 过滤非标量数据