diff --git a/src/Makefile b/src/Makefile
index 3617f40e..58ce53e9 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -33,6 +33,6 @@ BIN=$(DESTDIR)/usr/lib/alternc/
 install: 
 	chown root:www-data $(BIN)
 	chmod 755 $(BIN)
-	install -o root -g www-data -m4754 $(SETUID) du.pl $(BIN)
-	install -o root -g www-data -m0754 $(SCRIPTS) $(BIN)
+	install -o root -g www-data -m4750 $(SETUID) du.pl $(BIN)
+	install -o root -g www-data -m0750 $(SCRIPTS) $(BIN)
 	install -o root -g www-data -m0644 $(LIBS) $(BIN)