diff --git a/packages/mermaid/src/dagre-wrapper/markers.js b/packages/mermaid/src/dagre-wrapper/markers.js
index 69082fc8c..0c4e56be7 100644
--- a/packages/mermaid/src/dagre-wrapper/markers.js
+++ b/packages/mermaid/src/dagre-wrapper/markers.js
@@ -25,7 +25,7 @@ const getBackgroundColor = (elem) => {
 
   let backgroundColor;
   while (parent && parent.tagName.toLowerCase() !== 'body') {
-    if(parent instanceof Element) {
+    if (parent instanceof Element) {
       const computedStyle = getComputedStyle(parent);
       backgroundColor = computedStyle.backgroundColor;