diff --git a/ChartsSpace/ViewPort.js b/ChartsSpace/ViewPort.js
index 354c43747..77c7063b0 100644
--- a/ChartsSpace/ViewPort.js
+++ b/ChartsSpace/ViewPort.js
@@ -174,6 +174,7 @@ function newViewport () {
   }
 
   function onMouseWheel (event) {
+    if ((event.ctrlKey === true || event.metaKey === true)) { return }
     let morePower = 1
     let amount = event.delta
     if (event.buttons === 4) { morePower = 2 } // Mouse wheel pressed.