diff --git a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/ScaleAndCrop.php b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/ScaleAndCrop.php
index 2fcda58fad..ad53ec3fa1 100644
--- a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/ScaleAndCrop.php
+++ b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/ScaleAndCrop.php
@@ -20,6 +20,16 @@ class ScaleAndCrop extends GDImageToolkitOperationBase {
    */
   protected function arguments() {
     return [
+      'x' => [
+        'description' => 'The horizontal offset for the start of the crop, in pixels',
+        'required' => FALSE,
+        'default' => NULL,
+      ],
+      'y' => [
+        'description' => 'The vertical offset for the start the crop, in pixels',
+        'required' => FALSE,
+        'default' => NULL,
+      ],
       'width' => [
         'description' => 'The target width, in pixels',
       ],