diff --git a/src/hammer.js b/src/hammer.js
index 91b0c6a1..bc8f544f 100644
--- a/src/hammer.js
+++ b/src/hammer.js
@@ -68,6 +68,7 @@ function handlePinch(chart, state, e) {
 
 function startPinch(chart, state) {
   if (state.options.zoom.pinch.enabled) {
+    call(state.options.zoom.onZoomStart, [{chart}]);
     state.scale = 1;
   }
 }