diff --git a/collects/scribble/scribble-prefix.html b/collects/scribble/scribble-prefix.html
index 4ef584cc..f77a1b6e 100644
--- a/collects/scribble/scribble-prefix.html
+++ b/collects/scribble/scribble-prefix.html
@@ -1 +1 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">