diff --git a/owl/templates/join-token.html b/owl/templates/join-token.html
index 9bdb05aa59c7af095cd4c834aa5a49b628cc38d7..b6812c2077e85ac2aaa0e52f667c15cbbfdf45d4 100644
--- a/owl/templates/join-token.html
+++ b/owl/templates/join-token.html
@@ -5,7 +5,7 @@
 
 	{% if error %}
 		<p class=error>{{ error }}</p>
-		<p><a href='{{ url_for('index') }}' class=button>Go to main page</a></p>
+		<p><span class=button><a href='{{ url_for('index') }}'>Go to main page</a></span></p>
 	{% else %}
 		<form method="POST" action="?">
 			{{ form.csrf_token }}