diff --git a/Doc/Makefile b/Doc/Makefile
index c0556bd..a09b1bf 100644
--- a/Doc/Makefile
+++ b/Doc/Makefile
@@ -59,6 +59,7 @@
 
 # Destination directory for output of libwww target.
 PARTPARSE=	$(PYTHON) ./partparse.pyc
+TEXI2HTMLFLAGS= -d
 TEXI2HTML=	$(PYTHON) ./texi2html.pyc
 LIBHTMLDIR=	./python-lib
 
@@ -187,7 +188,7 @@
 
 libwww: lib.texi texi2html.pyc
 	if test ! -d $(LIBHTMLDIR); then mkdir $(LIBHTMLDIR); else true; fi
-	$(TEXI2HTML) -d lib.texi $(LIBHTMLDIR)
+	$(TEXI2HTML) $(TEXI2HTMLFLAGS) lib.texi $(LIBHTMLDIR)
 
 # Targets to convert the manuals to HTML using Nikos Drakos' LaTeX to
 # HTML converter.  For more info on this program, see