diff --git a/contrib/hstore_plperl/Makefile b/contrib/hstore_plperl/Makefile
index ddf6036..81fe1af 100644
--- a/contrib/hstore_plperl/Makefile
+++ b/contrib/hstore_plperl/Makefile
@@ -3,7 +3,7 @@
  MODULE_big = hstore_plperl
  OBJS = hstore_plperl.o

-PG_CPPFLAGS = -I$(top_srcdir)/src/pl/plperl -I$(perl_archlibexp)/CORE 
-I$(top_srcdir)/contrib/hstore
+PG_CPPFLAGS = -I$(top_srcdir)/src/pl/plperl -I$(top_srcdir)/contrib/hstore

  EXTENSION = hstore_plperl hstore_plperlu