diff --git a/app/models/user.rb b/app/models/user.rb
index ccdb8e7..611ac14 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -40,6 +40,7 @@ class User < ActiveRecord::Base
   end
 
   def online?
+    # when you change this, change footer.html.erb as well!
     last_seen && last_seen > 2.minutes.ago
   end
 
diff --git a/app/views/layouts/_footer.html.erb b/app/views/layouts/_footer.html.erb
index d5fe380..b9dbec2 100644
--- a/app/views/layouts/_footer.html.erb
+++ b/app/views/layouts/_footer.html.erb
@@ -1,7 +1,7 @@
 <% users = User.select{|u| u.online?} %>
 <div id="footer">
   <div id="online-users">
-    <p title="Seen within the last 2 minutes">Users currently online: <%= users.length %></p>
+    <p title="Seen within the last 2 minutes">Users seen within the last 2 minutes: <%= users.length %></p>
     <% users.each do |u| %>
       <%= render partial: "users/username", locals: { user: u } %>
     <% end %>