diff --git a/demo_test/Makefile b/demo_test/Makefile
index d2d3ced..533ef3a 100644
--- a/demo_test/Makefile
+++ b/demo_test/Makefile
@@ -24,6 +24,7 @@
 
 
 proto/importer.pb.go: ../proto/importer.proto
+	mkdir -p proto
 	protoc --proto_path=../proto \
 	-I${GOPATH}/src/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis \
 	--go_out=plugins=grpc:proto/ \