diff --git a/webssh/static/js/main.js b/webssh/static/js/main.js
index 1d1cf90..6d28ae6 100644
--- a/webssh/static/js/main.js
+++ b/webssh/static/js/main.js
@@ -58,7 +58,7 @@ jQuery(function($){
       form_id = '#connect',
       debug = document.querySelector(form_id).noValidate,
       fonts = document.fonts,
-      custom_font_family_name = $("body").attr("data-wssh-custom-font-family-name", ""),
+      custom_font_family_name = $("body").attr("data-wssh-custom-font-family-name") || "",
       custom_font = findFont(fonts, custom_font_family_name),
       default_fonts,
       DISCONNECTED = 0,