diff --git a/Makefile b/Makefile
index 92a472da4..12fbae141 100644
--- a/Makefile
+++ b/Makefile
@@ -403,7 +403,7 @@ proto-swagger-gen:
 proto-format:
 	@echo "Formatting Protobuf files"
 	@if docker ps -a --format '{{.Names}}' | grep -Eq "^${containerProtoFmt}$$"; then docker start -a $(containerProtoFmt); else docker run --name $(containerProtoFmt) -v $(CURDIR):/workspace --workdir /workspace tendermintdev/docker-build-proto \
-		find ./ -not -path "./third_party/*" -name *.proto -exec clang-format -i {} \; ; fi
+		find ./ -not -path "./third_party/*" -name "*.proto" -exec clang-format -i {} \; ; fi
 
 
 proto-lint: