diff --git a/module/ownet/perl5/Makefile.am b/module/ownet/perl5/Makefile.am
index 5823f4b..cebe1e6 100644
--- a/module/ownet/perl5/Makefile.am
+++ b/module/ownet/perl5/Makefile.am
@@ -8,7 +8,7 @@ OWNet/Makefile: OWNet/Makefile.PL
 if HAVE_DEBIAN
 	cd OWNet; $(PERL) Makefile.PL INSTALLDIRS=vendor
 else
-	cd OWNet; $(PERL) Makefile.PL
+	cd OWNet; $(PERL) Makefile.PL INSTALLDIRS=vendor
 endif
 
 install-data-local: OWNet/Makefile
diff --git a/module/swig/perl5/Makefile.am b/module/swig/perl5/Makefile.am
index 8e5f583..49cd252 100644
--- a/module/swig/perl5/Makefile.am
+++ b/module/swig/perl5/Makefile.am
@@ -19,7 +19,7 @@ else
 if HAVE_DEBIAN
 	( cd OW; $(PERL) Makefile.PL INSTALLDIRS=vendor )
 else
-	( cd OW; $(PERL) Makefile.PL )
+	( cd OW; $(PERL) Makefile.PL INSTALLDIRS=vendor )
 if HAVE_FREEBSD
 	$(PERL) -pi -e 's/ doc_(perl|site|\$$\(INSTALLDIRS\))_install$$//' OW/Makefile