diff --git a/Makefile b/Makefile
index 6bb329d..f864c99 100644
--- a/Makefile
+++ b/Makefile
@@ -43,7 +43,7 @@ etc/restic/b2_env.sh etc/restic/b2_pw.txt:
 # | means that dependencies are order-only i.e. only created if they don't already exist.
 install-conf: | $(SRCS_CONF)
 	install -d $(DEST_CONF)
-	install -m 0600 $(SRCS_CONF) $(DEST_CONF)
+	install -b -m 0600 $(SRCS_CONF) $(DEST_CONF)
 	$(RM) etc/restic/b2_env.sh etc/restic/b2_pw.txt
 
 # target: install-systemd - Install systemd timer and service files.