diff --git a/Makefile b/Makefile
index da4af03..c8c1de2 100644
--- a/Makefile
+++ b/Makefile
@@ -43,8 +43,8 @@ locale/pooler.pot: $(SRCS)
 
 install:
 	install -d -m700 $(DESTDIR)/etc/pooler
-	install -m755 dist/pooler $(DESTDIR)/$(PREFIX)/bin/pooler
-	install -m600 install/config.ini $(DESTDIR)/etc/pooler/config.ini
+	install -Dm755 dist/pooler $(DESTDIR)/$(PREFIX)/bin/pooler
+	install -Dm600 install/config.ini $(DESTDIR)/etc/pooler/config.ini
 	@for po in $(PO_DIRS) ; do \
 		echo "installing locale: $$po/pooler.mo" ; \
 		mkdir -pv $(DESTDIR)/$(PREFIX)/share/$$po ; \