diff --git a/protos/Makefile b/protos/Makefile
index aa5f8da..6ee661b 100644
--- a/protos/Makefile
+++ b/protos/Makefile
@@ -28,7 +28,7 @@
 all: googleapis libopenoltapi.a
 
 libopenoltapi.a: $(OBJS)
-	ar ru $@ $^
+	ar cr $@ $^
 	ranlib $@
 
 googleapis: