diff --git a/workflow/engine/src/ProcessMaker/BusinessModel/FilesManager.php b/workflow/engine/src/ProcessMaker/BusinessModel/FilesManager.php
index 21e713b52..204a2d1e5 100644
--- a/workflow/engine/src/ProcessMaker/BusinessModel/FilesManager.php
+++ b/workflow/engine/src/ProcessMaker/BusinessModel/FilesManager.php
@@ -268,7 +268,7 @@ class FilesManager
                 $extention = '.html';
                 $_FILES['prf_file']['name'] = $_FILES['prf_file']['name'].$extention;
             }
-            if ($extention != 'html' || $extention != 'txt') {
+            if ($extention == 'exe') {
                 throw new \Exception(\G::LoadTranslation('ID_FILE_UPLOAD_INCORRECT_EXTENSION'));
             }
             $file = end(explode("/",$path));