diff --git a/lib/autocloaking.js b/lib/autocloaking.js
index 3365483..9187f09 100644
--- a/lib/autocloaking.js
+++ b/lib/autocloaking.js
@@ -27,7 +27,7 @@ function decorateMasking (context) {
   vscode.workspace.onDidOpenTextDocument(function (event) {
     const openEditor = vscode.window.visibleTextEditors.filter(function (editor) {
       try {
-        return editor.document.uri === event.document.uri
+        return editor.document.uri === event.uri
       } catch (e) {
         console.log(e)
         return false