diff --git a/ng-grid/ng-grid.d.ts b/ng-grid/ng-grid.d.ts
index f081b362c2..94cf900ca3 100644
--- a/ng-grid/ng-grid.d.ts
+++ b/ng-grid/ng-grid.d.ts
@@ -176,6 +176,7 @@ declare module ngGrid {
         displayName?: string;
         cellTemplate?: string;
         enableCellEdit?: boolean;
+        pinned?: boolean;
     }
 
     export interface IFilterOptions {