diff --git a/stoptime.rb b/stoptime.rb
index 50837c2..cc31d76 100644
--- a/stoptime.rb
+++ b/stoptime.rb
@@ -1345,6 +1345,7 @@ module StopTime::Views
 
   # The main layout used by all views.
   def layout
+    doctype!
     html do
       head do
         title "Stop… Camping Time!"