diff --git a/win/rfb_win32/Service.h b/win/rfb_win32/Service.h
index 198726c..cbb6263 100644
--- a/win/rfb_win32/Service.h
+++ b/win/rfb_win32/Service.h
@@ -105,7 +105,8 @@
     //     event source information, etc.
     // *** should really accept TCHAR argv
 
-    bool registerService(const TCHAR* name, const TCHAR* desc, int argc, char** argv);
+    bool registerService(const TCHAR* name, const TCHAR* display,
+                         const TCHAR* desc, int argc, char** argv);
     bool unregisterService(const TCHAR* name);
 
     bool startService(const TCHAR* name);