diff --git a/Doc/lib/libcmp.tex b/Doc/lib/libcmp.tex
index a30da72e2bf..4f81b3c3281 100644
--- a/Doc/lib/libcmp.tex
+++ b/Doc/lib/libcmp.tex
@@ -5,6 +5,9 @@
 \sectionauthor{Moshe Zadka}{mzadka@geocities.com}
 \modulesynopsis{Compare files very efficiently.}
 
+% XXX check version number before release!
+\deprecated{1.5.3}{Use the \module{filecmp} module instead.}
+
 The \module{cmp} module defines a function to compare files, taking all
 sort of short-cuts to make it a highly efficient operation.
 
diff --git a/Doc/lib/libcmpcache.tex b/Doc/lib/libcmpcache.tex
index dab987e33f7..405c455b25b 100644
--- a/Doc/lib/libcmpcache.tex
+++ b/Doc/lib/libcmpcache.tex
@@ -5,6 +5,9 @@
 \sectionauthor{Moshe Zadka}{mzadka@geocities.com}
 \modulesynopsis{Compare files very efficiently.}
 
+% XXX check version number before release!
+\deprecated{1.5.3}{Use the \module{filecmp} module instead.}
+
 The \module{cmpcache} module provides an identical interface and similar
 functionality as the \refmodule{cmp} module, but can be a bit more efficient
 as it uses \function{statcache.stat()} instead of \function{os.stat()}