diff --git a/ui-grid/ui-grid.d.ts b/ui-grid/ui-grid.d.ts
index a6460dbd49..5f66eca1f8 100644
--- a/ui-grid/ui-grid.d.ts
+++ b/ui-grid/ui-grid.d.ts
@@ -2404,7 +2404,7 @@ declare module uiGrid {
              * Enable column resizing on an individual column
              * Defaults to GridOptions.enableColumnResizing
              */
-            enableColumnResizing: boolean;
+            enableColumnResizing?: boolean;
         }
         /**
          * Column Resizing Grid Options