--- Makefile.in.orig	2011-06-02 07:10:47 UTC
+++ Makefile.in
@@ -306,7 +306,7 @@ EXTRA_DIST = KNOWNBUG \
 	script/check_todo.sh \
 	script/check_whitespace.sh
 
-pkgconfigdir = $(libdir)/pkgconfig
+pkgconfigdir = ${prefix}/libdata/pkgconfig
 pkgconfig_DATA = libdmtx.pc
 all: config.h
 	$(MAKE) $(AM_MAKEFLAGS) all-recursive