diff --git a/ckeditor/ckeditor.d.ts b/ckeditor/ckeditor.d.ts
index 3bb90c7604..37e6094841 100644
--- a/ckeditor/ckeditor.d.ts
+++ b/ckeditor/ckeditor.d.ts
@@ -572,6 +572,7 @@ declare module CKEDITOR {
         colorButton_colors?: string;
         startupFocus?: boolean;
         on?: any;
+        extraPlugins?: string;
     }