diff --git a/common/rfb/CSecurityVeNCrypt.h b/common/rfb/CSecurityVeNCrypt.h
index 55d0744..1ff0c02 100644
--- a/common/rfb/CSecurityVeNCrypt.h
+++ b/common/rfb/CSecurityVeNCrypt.h
@@ -39,6 +39,7 @@
     virtual bool processMsg(CConnection* cc);// { return true; }
     int getType() const {return chosenType;}
     virtual const char* description() const { return secTypeName(chosenType); }
+    virtual bool isSecure() const;
 
   protected:
     CSecurity *csecurity;