diff --git a/guacamole/src/main/webapp/app/rest/services/tunnelService.js b/guacamole/src/main/webapp/app/rest/services/tunnelService.js
index e736f82a7..11c2e92c0 100644
--- a/guacamole/src/main/webapp/app/rest/services/tunnelService.js
+++ b/guacamole/src/main/webapp/app/rest/services/tunnelService.js
@@ -157,7 +157,7 @@ angular.module('rest').factory('tunnelService', ['$injector',
      *     The sanitized filename.
      */
     var sanitizeFilename = function sanitizeFilename(filename) {
-        return filename.replace(/\/+/g, '_');
+        return filename.replace(/[\\\/]+/g, '_');
     };
 
     /**