diff --git a/donna/donna.d.ts b/donna/donna.d.ts
index fed09fa98..c953764d1 100644
--- a/donna/donna.d.ts
+++ b/donna/donna.d.ts
@@ -25,6 +25,7 @@ declare module DonnaTypes {
         type: string;
         name: string;
         bindingType: string;
+        paramNames?: string[];
         classProperties?: any[];
         prototypeProperties?: number[][];
         doc?: string;