diff --git a/lib/cpp/src/protocol/TJSONProtocol.h b/lib/cpp/src/protocol/TJSONProtocol.h
index cece97e..cbf4ef8 100644
--- a/lib/cpp/src/protocol/TJSONProtocol.h
+++ b/lib/cpp/src/protocol/TJSONProtocol.h
@@ -288,7 +288,7 @@
 /**
  * Constructs input and output protocol objects given transports.
  */
-class TJSONProtocolFactory {
+class TJSONProtocolFactory : public TProtocolFactory {
  public:
   TJSONProtocolFactory() {}