diff --git a/types/chart.js/chart.js-tests.ts b/types/chart.js/chart.js-tests.ts
index 8400fb5db7..8bbbaab044 100644
--- a/types/chart.js/chart.js-tests.ts
+++ b/types/chart.js/chart.js-tests.ts
@@ -1,4 +1,4 @@
-import { Chart, ChartData } from 'chart.js';
+import { Chart, ChartData, Point } from 'chart.js';
 
 // alternative:
 // import chartjs = require('chart.js');
@@ -67,10 +67,9 @@ if (chart.chartArea) {
 }
 
 // http://www.chartjs.org/docs/latest/configuration/tooltip.html#position-modes
-Chart.Tooltip.positioners.custom = function(elements: any, eventPosition: any) {
-    const tooltip = this;
+Chart.Tooltip.positioners.custom = function(elements: any[], eventPosition: Point) {
     return {
-        x: 0,
-        y: 0
+        x: eventPosition.x,
+        y: eventPosition.y + 10
     };
 };
diff --git a/types/chart.js/index.d.ts b/types/chart.js/index.d.ts
index 83b164f15a..25b579db7f 100644
--- a/types/chart.js/index.d.ts
+++ b/types/chart.js/index.d.ts
@@ -46,7 +46,7 @@ declare class Chart {
     };
 
     // Tooltip Static Options
-    static Tooltip: Chart.ChartTooltipsStaticConfiguartion;
+    static Tooltip: Chart.ChartTooltipsStaticConfiguration;
 }
 declare class PluginServiceStatic {
     register(plugin: PluginServiceRegistrationOptions): void;
@@ -278,7 +278,7 @@ declare namespace Chart {
         borderWidth?: number;
     }
 
-    interface ChartTooltipsStaticConfiguartion {
+    interface ChartTooltipsStaticConfiguration {
         positioners: {[mode: string]: ChartTooltipPositioner};
     }