diff --git a/jquery.mmenu/jquery.mmenu-tests.ts b/jquery.mmenu/jquery.mmenu-tests.ts
index 9fbb9b776..ae52793d6 100644
--- a/jquery.mmenu/jquery.mmenu-tests.ts
+++ b/jquery.mmenu/jquery.mmenu-tests.ts
@@ -1,5 +1,5 @@
 ///<reference path="../jquery/jquery.d.ts" />
-///<reference path="/jquery.mmenu/jquery.mmenu.d.ts" />
+///<reference path="../jquery.mmenu/jquery.mmenu.d.ts" />
 
 
 // --------------------------------------------------------
@@ -44,7 +44,7 @@ menu.mmenu(
 // ------------------- TEST MMENU API ---------------------
 // --------------------------------------------------------
 
-var api: JQueryMmenu.API = menu.data("mmenu");
+var api = menu.data("mmenu");
 var myPanel: JQuery = $("#panel");
 var listItem: JQuery = $(".list-item");
 
diff --git a/jquery.mmenu/jquery.mmenu.d.ts b/jquery.mmenu/jquery.mmenu.d.ts
index 97874f8f0..a502c37cd 100644
--- a/jquery.mmenu/jquery.mmenu.d.ts
+++ b/jquery.mmenu/jquery.mmenu.d.ts
@@ -157,6 +157,13 @@ declare module JQueryMmenu {
 
     interface API {
 
+        /**
+         * Trigger non-specialized signature method
+         * @param methodName
+         * @param callback
+         */
+        bind(methodName: string, callback: (...args: any[]) => void): any;
+
         /**
          * Trigger this method to close all opened panels and go back to the first panel.
          */
@@ -169,48 +176,48 @@ declare module JQueryMmenu {
          * (only available if the "slidingSubmenus" option is set to false).
          * @param panel
          */
-        closePanel(panel: JQuery);
+        closePanel(panel: JQuery): void;
         /** @see closePanel() */
-        bind(methodName: "closePanel", callback: (panel: JQuery) => void);
+        bind(methodName: "closePanel", callback: (panel: JQuery) => void): void;
 
         /**
          * Trigger this method to get the class instance for the menu.
          */
-        getInstance();
+        getInstance(): void;
         /** @see getInstance() */
-        bind(methodName: "getInstance", callback: () => void);
+        bind(methodName: "getInstance", callback: () => void): void;
 
         /**
          * Trigger this method to (re)initialize a newly added panel.
          * @param panel The panel to (re)initialize.
          */
-        init(panel: JQuery);
+        init(panel: JQuery): void;
         /** @see init() */
-        bind(methodName: "init", callback: (panel: JQuery) => void);
+        bind(methodName: "init", callback: (panel: JQuery) => void): void;
 
         /**
          * Trigger this method to open a panel.
          * @param panel The panel to open.
          */
-        openPanel(panel: JQuery);
+        openPanel(panel: JQuery): void;
         /** @see openPanel() */
-        bind(methodName: "openPanel", callback: (panel: JQuery) => void);
+        bind(methodName: "openPanel", callback: (panel: JQuery) => void): void;
 
         /**
          * Trigger this method to set or unset a list item as "selected".
          * @param li The list item to set or unset as "selected".
          * @param selected Whether to set or unset the list item as "selected". Default: true
          */
-        setSelected(li: JQuery, selected?: boolean);
+        setSelected(li: JQuery, selected?: boolean): void;
         /** @see setSelected() */
-        bind(methodName: "setSelected", callback: (li: JQuery, selected?: boolean) => void);
+        bind(methodName: "setSelected", callback: (li: JQuery, selected?: boolean) => void): void;
 
         /**
          * Trigger this method to update the appearance for the menu.
          */
-        update();
+        update(): void;
         /** @see update() */
-        bind(methodName: "update", callback: () => void);
+        bind(methodName: "update", callback: () => void): void;
 
     }
 
@@ -226,4 +233,10 @@ interface JQuery {
     mmenu(options: JQueryMmenu.Options): JQuery;
     mmenu(options: JQueryMmenu.Options, configurations: JQueryMmenu.Configurations): JQuery;
 
+    /**
+     * Return the mmenu object
+     * @param element
+     */
+    data(element: "mmenu"): JQueryMmenu.API;
+
 }