diff --git a/hw/xwin/winclipboardthread.c b/hw/xwin/winclipboardthread.c
index f2e8e6d6f..4479b543b 100644
--- a/hw/xwin/winclipboardthread.c
+++ b/hw/xwin/winclipboardthread.c
@@ -47,7 +47,6 @@
  */
 
 extern Bool g_fUnicodeClipboard;
-extern unsigned long serverGeneration;
 extern Bool g_fClipboardStarted;
 extern Bool g_fClipboardLaunched;
 extern Bool g_fClipboard;