diff --git a/Doc/Makefile b/Doc/Makefile
index 231e71a..8034d39 100644
--- a/Doc/Makefile
+++ b/Doc/Makefile
@@ -122,7 +122,7 @@
     libmailbox.tex libcommands.tex libcmath.tex libni.tex libgzip.tex \
     libpprint.tex libcode.tex libmimify.tex libre.tex libmacic.tex \
     libuserdict.tex libdis.tex libxmllib.tex libqueue.tex \
-    liblocale.tex libbasehttp.tex
+    liblocale.tex libbasehttp.tex libcopyreg.tex
 
 # Library document
 lib.dvi: modindex.py $(LIBFILES)