diff -up  a/unix/xserver/mi/miinitext.c  b/unix/xserver/mi/miinitext.c
---  a/unix/xserver/mi/miinitext.c	2023-05-22 11:41:42.066729872 +0800
+++  b/unix/xserver/mi/miinitext.c	2023-05-22 11:50:22.365506587 +0800
@@ -108,7 +108,7 @@ SOFTWARE.
 #include "globals.h"
 
 #ifdef TIGERVNC
-extern void vncExtensionInit(INITARGS);
+extern void vncExtensionInit();
 #endif
 
 /* List of built-in (statically linked) extensions */