diff --git a/collects/mzlib/scribblings/class100.scrbl b/collects/mzlib/scribblings/class100.scrbl
index 1c86276e92..c466e6d2d6 100644
--- a/collects/mzlib/scribblings/class100.scrbl
+++ b/collects/mzlib/scribblings/class100.scrbl
@@ -6,6 +6,9 @@
 
 @mzlib[#:mode title class100]
 
+@deprecated[@racketmodname[racket/class]]{This library will be
+removed in a future version.}
+
 The @racket[class100] and @racket[class100*] forms provide a syntax
 close to that of @racket[class] and @racket[class*] in Racket
 versions 100 through 103, but with the semantics of the current