--- ./unix/xserver/hw/vnc/xvnc.c.orig	2019-12-20 01:02:02.000000000 -0600
+++ ./unix/xserver/hw/vnc/xvnc.c	2020-02-09 16:48:59.587362042 -0600
@@ -295,6 +295,15 @@
 }
 #endif
 
+#if INPUTTHREAD
+/** This function is called in Xserver/os/inputthread.c when starting
+    the input thread. */
+void
+ddxInputThreadInit(void)
+{
+}
+#endif
+
 void ddxUseMsg(void)
 {
     vncPrintBanner();