diff --git a/Makefile.am b/Makefile.am
index dc594f8..52a4722 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -228,7 +228,7 @@ build-perl:
 	@test -e $(builddir)/src/perl/t/Location.t || ln -s --relative $(srcdir)/src/perl/t/Location.t $(builddir)/src/perl/t/
 	@test -e $(builddir)/src/perl/typemap || ln -s --relative $(srcdir)/src/perl/typemap $(builddir)/src/perl/
 
-	cd $(builddir)/src/perl && $(PERL) Makefile.PL PREFIX="$(prefix)" \
+	cd $(builddir)/src/perl && $(PERL) Makefile.PL INSTALLDIRS=vendor \
 		INC="-I$(abs_srcdir)/src" LIBS="-L$(abs_builddir)/src/.libs -lloc"
 	cd $(builddir)/src/perl && $(MAKE) CC="$(CC)" LD="$(LD)" LD_RUN_PATH=