diff --git a/d3/d3.d.ts b/d3/d3.d.ts
index f3dbee63d..e1d501e0b 100644
--- a/d3/d3.d.ts
+++ b/d3/d3.d.ts
@@ -60,6 +60,7 @@ declare module D3 {
         altKey?: boolean;
         ctrlKey?: boolean;
         metaKey?: boolean;
+        shiftKey?: boolean;
         type: string;
     }