diff --git a/d3/d3.d.ts b/d3/d3.d.ts
index 0fb3f58b45..5f68f6f362 100644
--- a/d3/d3.d.ts
+++ b/d3/d3.d.ts
@@ -54,6 +54,7 @@ declare module D3 {
         y: number;
         keyCode: number;
         altKey: any;
+        type: string;
     }
 
     export interface Base extends Selectors {