diff --git a/lib/delphi/src/Thrift.Protocol.JSON.pas b/lib/delphi/src/Thrift.Protocol.JSON.pas
index 515d85c..52909b7 100644
--- a/lib/delphi/src/Thrift.Protocol.JSON.pas
+++ b/lib/delphi/src/Thrift.Protocol.JSON.pas
@@ -140,7 +140,7 @@
 
   public
     // TJSONProtocolImpl Constructor
-    constructor Create( const aTrans : ITransport);
+    constructor Create( const aTrans : ITransport);  override;
     destructor Destroy;   override;
 
   strict protected