diff --git a/core/zoom_controls.js b/core/zoom_controls.js
index b06c24e32..3c8dd8a52 100644
--- a/core/zoom_controls.js
+++ b/core/zoom_controls.js
@@ -241,7 +241,7 @@ Blockly.ZoomControls.prototype.createZoomInSvg_ = function(rnd) {
   var ws = this.workspace_;
   var svgHolder = Blockly.utils.createSvgElement('svg',
       {
-        'y': 0
+        "id": "svg" + rnd
       },
       this.svgGroup_);
   var clip = Blockly.utils.createSvgElement('clipPath',