diff --git a/common/rfb/CMsgWriter.cxx b/common/rfb/CMsgWriter.cxx
index 57d1283..84a0d1f 100644
--- a/common/rfb/CMsgWriter.cxx
+++ b/common/rfb/CMsgWriter.cxx
@@ -256,7 +256,7 @@
 }
 
 
-void CMsgWriter::clientCutText(const char* str, rdr::U32 len)
+void CMsgWriter::clientCutText(const char* str, int len)
 {
   startMsg(msgTypeClientCutText);
   os->pad(3);
diff --git a/common/rfb/CMsgWriter.h b/common/rfb/CMsgWriter.h
index 56e0b7b..b1f0119 100644
--- a/common/rfb/CMsgWriter.h
+++ b/common/rfb/CMsgWriter.h
@@ -57,7 +57,7 @@
 
     virtual void keyEvent(rdr::U32 keysym, rdr::U32 keycode, bool down);
     virtual void pointerEvent(const Point& pos, int buttonMask);
-    virtual void clientCutText(const char* str, rdr::U32 len);
+    virtual void clientCutText(const char* str, int len);
 
   protected:
     void startMsg(int type);