diff --git a/docs/en/02_Developer_Guides/03_Forms/How_Tos/04_Create_a_GridField_ActionProvider.md b/docs/en/02_Developer_Guides/03_Forms/How_Tos/04_Create_a_GridField_ActionProvider.md
index c2b404865..a51b960a4 100644
--- a/docs/en/02_Developer_Guides/03_Forms/How_Tos/04_Create_a_GridField_ActionProvider.md
+++ b/docs/en/02_Developer_Guides/03_Forms/How_Tos/04_Create_a_GridField_ActionProvider.md
@@ -184,7 +184,7 @@ class GridFieldCustomAction implements GridField_ColumnProvider, GridField_Actio
         return 'Custom action';
     }
     
-    public function getCustomAction()
+    public function getCustomAction($gridField, $record)
     {
         if(!$record->canEdit()) return;