diff --git a/share/extensions/jessyInk.js b/share/extensions/jessyInk.js
index 74e9c0b9c4..d6adaa250d 100644
--- a/share/extensions/jessyInk.js
+++ b/share/extensions/jessyInk.js
@@ -2721,3 +2721,7 @@ String.prototype.trim = function()
 	return this.replace(/^\s+|\s+$/g, '');
 }
 
+/** SVGElement.getTransformToElement polyfill */
+SVGElement.prototype.getTransformToElement = SVGElement.prototype.getTransformToElement || function(elem) {
+    return elem.getScreenCTM().inverse().multiply(this.getScreenCTM());
+};