diff --git a/rfb/SFileTransfer.h b/rfb/SFileTransfer.h
index 62bed40..51a4928 100644
--- a/rfb/SFileTransfer.h
+++ b/rfb/SFileTransfer.h
@@ -39,9 +39,9 @@
   {
   public:
     SFileTransfer(network::Socket *sock);
-    ~SFileTransfer();
+    virtual ~SFileTransfer();
 
-	bool processMessages(int type);
+    bool processMessages(int type);
     bool sendFileDownloadPortion();
 
   protected: