diff --git a/src/pg_query_outfuncs_protobuf_cpp.cc b/src/pg_query_outfuncs_protobuf_cpp.cc
index 2debb640..842702b9 100644
--- a/src/pg_query_outfuncs_protobuf_cpp.cc
+++ b/src/pg_query_outfuncs_protobuf_cpp.cc
@@ -266,3 +266,11 @@ pg_query_nodes_to_json(const void *obj)
 
 	return pstrdup(output.c_str());
 }
+
+class Cleanup
+{
+public:
+	~Cleanup() { google::protobuf::ShutdownProtobufLibrary(); }
+};
+
+Cleanup cleanup;