diff --git a/common/rfb/SMsgWriter.h b/common/rfb/SMsgWriter.h
index 2db147b..ddddb09 100644
--- a/common/rfb/SMsgWriter.h
+++ b/common/rfb/SMsgWriter.h
@@ -32,6 +32,7 @@
 namespace rfb {
 
   class ClientParams;
+  class PixelFormat;
   struct ScreenSet;
 
   class SMsgWriter {
@@ -41,7 +42,8 @@
 
     // writeServerInit() must only be called at the appropriate time in the
     // protocol initialisation.
-    void writeServerInit();
+    void writeServerInit(rdr::U16 width, rdr::U16 height,
+                         const PixelFormat& pf, const char* name);
 
     // Methods to write normal protocol messages