diff --git a/UI/Common/UIxPageFrame.m b/UI/Common/UIxPageFrame.m
index 5ed2ff042..2996d7d26 100644
--- a/UI/Common/UIxPageFrame.m
+++ b/UI/Common/UIxPageFrame.m
@@ -113,9 +113,7 @@
 
 - (NSString *) doctype
 {
-  return (@"<!DOCTYPE html"
-          @" PUBLIC \"-//W3C//DTD XHTML 1.1//EN\""
-          @" \"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\">");
+  return (@"<!DOCTYPE html>");
 }
 
 /* Help URL/target */
