diff --git a/extensions/gii/generators/crud/Generator.php b/extensions/gii/generators/crud/Generator.php
index 72c94a1b05..3a58b44233 100644
--- a/extensions/gii/generators/crud/Generator.php
+++ b/extensions/gii/generators/crud/Generator.php
@@ -250,7 +250,7 @@ class Generator extends \yii\gii\Generator
             } elseif ($column->phpType !== 'string' || $column->size === null) {
                 return "\$form->field(\$model, '$attribute')->$input()";
             } else {
-                return "\$form->field(\$model, '$attribute')->$input(['maxlength' => $column->size])";
+                return "\$form->field(\$model, '$attribute')->$input(['maxlength' => true])";
             }
         }
     }