diff --git a/js/main.js b/js/main.js
index fcf60e8..e2c0b6f 100644
--- a/js/main.js
+++ b/js/main.js
@@ -1134,6 +1134,7 @@ PublicServers.prototype.joinServer = function (code) {
 };
 
 PublicServers.prototype.escape = function(unsafe) {
+	if(unsafe === undefined) return "";
     return unsafe
          .replace(/&/g, "&")
          .replace(/</g, "&lt;")
diff --git a/js/main.min.js b/js/main.min.js
index fcf60e8..e2c0b6f 100644
--- a/js/main.min.js
+++ b/js/main.min.js
@@ -1134,6 +1134,7 @@ PublicServers.prototype.joinServer = function (code) {
 };
 
 PublicServers.prototype.escape = function(unsafe) {
+	if(unsafe === undefined) return "";
     return unsafe
          .replace(/&/g, "&amp;")
          .replace(/</g, "&lt;")