diff --git a/Doc/lib/libundoc.tex b/Doc/lib/libundoc.tex
index 2009467f852..8a6f0d9432a 100644
--- a/Doc/lib/libundoc.tex
+++ b/Doc/lib/libundoc.tex
@@ -100,8 +100,6 @@ py_compile.py -- "compile" a .py file to a .pyc file
 repr.py -- Redo the `...` (representation) but with limits on most
 sizes (used by pdb)
 
-copy_reg.py -- helper to provide extensibility for pickle/cPickle
-
 
 \section{Multimedia}
 
diff --git a/Doc/libundoc.tex b/Doc/libundoc.tex
index 2009467f852..8a6f0d9432a 100644
--- a/Doc/libundoc.tex
+++ b/Doc/libundoc.tex
@@ -100,8 +100,6 @@ py_compile.py -- "compile" a .py file to a .pyc file
 repr.py -- Redo the `...` (representation) but with limits on most
 sizes (used by pdb)
 
-copy_reg.py -- helper to provide extensibility for pickle/cPickle
-
 
 \section{Multimedia}