diff --git a/editor/js/ui/library.js b/editor/js/ui/library.js
index 2f78828c3..a3419f99a 100644
--- a/editor/js/ui/library.js
+++ b/editor/js/ui/library.js
@@ -447,7 +447,10 @@ RED.library = (function() {
                             click: function() {
                                 //TODO: move this to RED.library
                                 var flowName = $("#node-input-library-filename").val();
-                                if (!/^\s*$/.test(flowName)) {
+                                flowName = flowName.trim();
+                                if(flowName === "" || flowName.endsWith("/")) {
+                                    RED.notify(RED._("library.invalidFilename"),"warning");
+                                } else {
                                     $.ajax({
                                         url:'library/flows/'+flowName,
                                         type: "POST",