diff --git a/ui-grid/ui-grid.d.ts b/ui-grid/ui-grid.d.ts
index ef013fdf1..bcf6efe7e 100644
--- a/ui-grid/ui-grid.d.ts
+++ b/ui-grid/ui-grid.d.ts
@@ -3752,7 +3752,7 @@ declare module uiGrid {
     }
 
     export interface ICellClassGetter<TEntity> {
-        (gridRow?: IGridRowOf<TEntity>, gridCol?: IGridColumnOf<TEntity>, colRenderIndex?: number): string;
+        (grid?: IGridInstanceOf<TEntity>, gridRow?: IGridRowOf<TEntity>, gridCol?: IGridColumnOf<TEntity>, rowRenderIndex?: number, colRenderIndex?: number): string;
     }
 
     export interface ICellTooltipGetter<TEntity> {
@@ -3762,7 +3762,7 @@ declare module uiGrid {
         (gridCol: IGridColumnOf<TEntity>): string;
     }
     export interface IHeaderFooterCellClassGetter<TEntity> {
-        (gridRow: IGridRowOf<TEntity>, rowRenderIndex: number, gridCol: IGridColumnOf<TEntity>, colRenderIndex: number)
+        (grid: IGridInstanceOf<TEntity>, gridRow: IGridRowOf<TEntity>, gridCol: IGridColumnOf<TEntity>, rowRenderIndex: number, colRenderIndex: number)
             : string;
     }
     export interface IMenuItem {