diff --git a/frontend/src/utils/utils.js b/frontend/src/utils/utils.js
index 2d4c0bec46..143c4b17ab 100644
--- a/frontend/src/utils/utils.js
+++ b/frontend/src/utils/utils.js
@@ -655,7 +655,7 @@ export const Utils = {
     }
 
     if (permission == 'rw' && enableOnlyoffice &&
-      onlyofficeConverterExtensions.includes(this.getFileExtension(dirent.name, false))) {
+      onlyofficeConverterExtensions.includes(Utils.getFileExtension(dirent.name, false))) {
       list.push(ONLYOFFICE_CONVERT);
     }