diff --git a/amcharts/index.d.ts b/amcharts/index.d.ts
index 41f7615ee3..bc41907d50 100644
--- a/amcharts/index.d.ts
+++ b/amcharts/index.d.ts
@@ -31,7 +31,7 @@ declare namespace AmCharts {
     function clear(): void;
 
     /** Handle ready event */
-    function ready(Function): void;
+    function ready(f: Function): void;
 
     /** Create chart by params. */
     function makeChart(selector: string, params: any, delay?: number): AmChart;
@@ -44,7 +44,7 @@ declare namespace AmCharts {
      * @param {string[]} types - Which chart types should call this method. Defaults to all
      * if none is passed.
      */
-    function addInitHandler(handler: Function, types: string[]);
+    function addInitHandler(handler: Function, types: string[]): any;
 
     /** AmPieChart class creates pie/donut chart. In order to display pie chart you need to set at least three properties - dataProvider, titleField and valueField.
         @example
@@ -1035,7 +1035,7 @@ If you do not set properties such as dashLength, lineAlpha, lineColor, etc - val
             bold - specifies if text is bold (true/false),
             url - url
         */
-        addLabel(x: number|string, y: number|string, text: string, align: string, size?: number, color?: string, rotation?: number, alpha?: number, bold?: boolean, url?: string);
+        addLabel(x: number|string, y: number|string, text: string, align: string, size?: number, color?: string, rotation?: number, alpha?: number, bold?: boolean, url?: string): any;
         /** Adds a legend to the chart.
             By default, you don't need to create div for your legend, however if you want it to be positioned in some different way, you can create div anywhere you want and pass id or reference to your div as a second parameter.
             (NOTE: This method will not work on StockPanel.)
@@ -2597,7 +2597,7 @@ Your function should return string.*/
         libs: Object;
         menu: Object;
         config: any;
-        capture(config: any, callback: () => void);
-        toJPG(config: any, callback: (config:any) => void);
+        capture(config: any, callback: () => void): any;
+        toJPG(config: any, callback: (config:any) => void): any;
     }
 }