diff --git a/doc/Makefile.am b/doc/Makefile.am
index 34dd9c9b..3a37ff47 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -19,8 +19,6 @@ EXTRA_DIST = FAQ.txt GIT.txt Protocol.txt Platforms.txt README-AUX.txt \
 maintainer-clean-local:
 	rm -f Makefile Makefile.in
 
-docdir ?= $(datadir)/doc/$(PACKAGE)
-
 documents = $(EXTRA_DIST) ../AUTHORS ../COPYING ../ChangeLog ../INSTALL \
 	../NEWS ../README