diff --git a/fbsdk/fbsdk.d.ts b/fbsdk/fbsdk.d.ts
index 146f7d76a..6f5df4fea 100644
--- a/fbsdk/fbsdk.d.ts
+++ b/fbsdk/fbsdk.d.ts
@@ -100,7 +100,9 @@ interface FBSDK{
 	init(fbInitObject : FBInitParams) : void;
 
 	/* This method lets you make calls to the Graph API. */
-	api(path : string, method ?: string, params ?: Object, callback : (fbResponseObject : Object) => any) :  Object;
+	api(path : string, method : string, callback : (fbResponseObject : Object) => any) :  Object;
+	api(path : string, params : Object, callback : (fbResponseObject : Object) => 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. */
 	ui(params : FBUIParams, handler : (fbResponseObject : Object) => any) : void;