diff --git a/hw/xwin/winclipboardwrappers.c b/hw/xwin/winclipboardwrappers.c
index 008088b6a..bfd6bff8b 100644
--- a/hw/xwin/winclipboardwrappers.c
+++ b/hw/xwin/winclipboardwrappers.c
@@ -56,8 +56,6 @@ DISPATCH_PROC(winProcSetSelectionOwner);
  * References to external symbols
  */
 
-extern unsigned int g_uiAuthDataLen;
-extern char *g_pAuthData;
 extern Bool g_fClipboardLaunched;
 extern Bool g_fClipboardStarted;
 extern Bool g_fClipboard;