diff --git a/files/js/files.js b/files/js/files.js
index 73a16100a6..e6df7e6bfa 100644
--- a/files/js/files.js
+++ b/files/js/files.js
@@ -371,6 +371,9 @@ $(document).ready(function() {
 });
 
 function scanFiles(force,dir){
+	if(!dir){
+		dir='';
+	}
 	force=!!force; //cast to bool
 	scanFiles.scanning=true;
 	$('#scanning-message').show();