diff --git a/lib/draw/BpmnRenderer.js b/lib/draw/BpmnRenderer.js
index 95e380aa4d..7f284edc25 100644
--- a/lib/draw/BpmnRenderer.js
+++ b/lib/draw/BpmnRenderer.js
@@ -160,7 +160,7 @@ export default function BpmnRenderer(
   function colorEscape(str) {
 
     // only allow characters and numbers
-    return str.replace(/[^0-9a-zA-z]+/g, '_');
+    return str.replace(/[^0-9a-zA-Z]+/g, '_');
   }
 
   function marker(type, fill, stroke) {