diff --git a/core/workspace_svg.js b/core/workspace_svg.js
index 3ec92848e..c5478ed12 100644
--- a/core/workspace_svg.js
+++ b/core/workspace_svg.js
@@ -880,7 +880,7 @@ Blockly.WorkspaceSvg.prototype.createDom = function(opt_backgroundClass) {
     // This no-op works around https://bugs.webkit.org/show_bug.cgi?id=226683,
     // which otherwise prevents zoom/scroll events from being observed in
     // Safari. Once that bug is fixed it should be removed.
-    document.body.addEventListener('wheel', function(e) {});
+    document.body.addEventListener('wheel', function() {});
     Blockly.browserEvents.conditionalBind(
         this.svgGroup_, 'wheel', this, this.onMouseWheel_);
   }