diff --git a/unix/xserver/hw/vnc/Input.c b/unix/xserver/hw/vnc/Input.c
index 8e47d74..2519ad3 100644
--- a/unix/xserver/hw/vnc/Input.c
+++ b/unix/xserver/hw/vnc/Input.c
@@ -687,3 +687,12 @@ static void vncKeysymKeyboardEvent(KeySym keysym, int down)
 	 */
 	mieqProcessInputEvents();
 }
+
+#if INPUTTHREAD
+/** This function is called in Xserver/os/inputthread.c when starting
+    the input thread. */
+void
+ddxInputThreadInit(void)
+{
+}
+#endif