Index: trunk/BNC/RTIGS/RTIGSDecoder.h
===================================================================
--- trunk/BNC/RTIGS/RTIGSDecoder.h	(revision 627)
+++ trunk/BNC/RTIGS/RTIGSDecoder.h	(revision 645)
@@ -33,6 +33,6 @@
 public:
   RTIGSDecoder();
-  ~RTIGSDecoder();
-  void Decode(char* buffer = 0, int bufLen = 0);
+  virtual ~RTIGSDecoder();
+  virtual void Decode(char* buffer = 0, int bufLen = 0);
 private:
   CGPS_Transform _GPSTrans;