diff --git a/fbsdk/fbsdk.d.ts b/fbsdk/fbsdk.d.ts
index 2be6f513a..36078fdde 100644
--- a/fbsdk/fbsdk.d.ts
+++ b/fbsdk/fbsdk.d.ts
@@ -149,13 +149,17 @@ interface FBSDKCanvas{
     stopTimer(handler?: (fbResponseObject : Object) => any) : void;
 }
 
+interface FBResponseObject {
+    error: any;
+}
+
 interface FBSDK{
     /* This method is used to initialize and setup the SDK. */
     init(fbInitObject : FBInitParams) : void;
 
     /* This method lets you make calls to the Graph API. */
     api(path : string, method : string, callback : (fbResponseObject : Object) => any) :  Object;
-    api(path : string, params : Object, callback : (fbResponseObject : Object) => any) :  Object;
+    api(path : string, params : Object, callback : (fbResponseObject : FBResponseObject) => any) :  Object;
     api(path : string, method : string, params : Object, callback : (fbResponseObject : Object) => any) : Object;
 
     /* This method is used to trigger different forms of Facebook created UI dialogs. */