--- Makefile.in.orig	2015-03-12 14:42:02 UTC
+++ Makefile.in
@@ -396,9 +396,10 @@ libptexenc_la_SOURCES = \
 libptexenc_la_LIBADD = $(KPATHSEA_LIBS)
 nobase_include_HEADERS = \
 	ptexenc/ptexenc.h \
-	ptexenc/unicode.h
+	ptexenc/unicode.h \
+	ptexenc/unicode-jp.h
 
-pkgconfigdir = ${libdir}/pkgconfig
+pkgconfigdir = $(prefix)/libdata/pkgconfig
 pkgconfig_DATA = ptexenc.pc
 EXTRA_DIST = COPYRIGHT ChangeLog.jp