diff --git a/collects/scribblings/reference/reference.scrbl b/collects/scribblings/reference/reference.scrbl
index b5b1a67b65..42880b257d 100644
--- a/collects/scribblings/reference/reference.scrbl
+++ b/collects/scribblings/reference/reference.scrbl
@@ -1,4 +1,4 @@
-#lang scribble/doc
+#lang scribble/manual
 @(require "mz.ss" 
           scribble/core 
           scribble/html-properties