diff --git a/extension.js b/extension.js
index 6457e71..806dd3a 100644
--- a/extension.js
+++ b/extension.js
@@ -90,10 +90,10 @@ class PHPCBF {
         }
         args.push(tmpFileName);
 
-        this.standard = this.getStandard(document);
+        const standard = this.getStandard(document);
 
-        if (this.standard) {
-            args.push("--standard=" + this.standard);
+        if (standard) {
+            args.push("--standard=" + standard);
         }
         if (this.debug) {
             console.group("PHPCBF");