diff -Naur libdvdread.orig/m4/Makefile.am libdvdread/m4/Makefile.am
--- libdvdread.orig/m4/Makefile.am	2008-10-03 21:11:28.000000000 +0100
+++ libdvdread/m4/Makefile.am	2009-07-12 11:11:18.108683340 +0100
@@ -2,10 +2,6 @@
 
 EXTRA_DIST = dvdread.m4
 
-if INSTALL_M4
-m4datadir = @ACLOCAL_DIR@
-else
 m4datadir = $(datadir)/aclocal
-endif
 
 m4data_DATA = dvdread.m4