diff -ur a/docs/manual/Makefile.am b/docs/manual/Makefile.am
--- a/docs/manual/Makefile.am	2013-09-02 05:46:56.000000000 +0200
+++ b/docs/manual/Makefile.am	2015-03-05 11:22:03.645828113 +0100
@@ -1,4 +1,4 @@
-docdir = ${datadir}/docs/udis86/manual
+docdir = @docdir@/manual
 
 rst_sources = \
 	index.rst \
diff -ur a/docs/x86/Makefile.am b/docs/x86/Makefile.am
--- a/docs/x86/Makefile.am	2013-06-29 21:58:38.000000000 +0200
+++ b/docs/x86/Makefile.am	2015-03-05 11:22:30.477826105 +0100
@@ -1,4 +1,4 @@
-docdir = ${datadir}/docs/udis86/x86
+docdir = @docdir@/x86
 dist_doc_DATA = optable.xml optable.xsl
 
 MAINTAINERCLEANFILES = Makefile.in
