diff -Nuar xc.orig/lib/Xi/XGetVers.c xc/lib/Xi/XGetVers.c
--- xc.orig/lib/Xi/XGetVers.c	2004-04-23 20:43:44.000000000 +0200
+++ xc/lib/Xi/XGetVers.c	2005-12-26 01:58:54.000000000 +0100
@@ -67,10 +67,8 @@
     {       
     XExtensionVersion		*ext;
 
-    LockDisplay (dpy);
     ext = _XiGetExtensionVersion (dpy, name);
     if (ext != (XExtensionVersion *) NoSuchExtension) {
-	UnlockDisplay (dpy);
 	SyncHandle();
     }
     return (ext);
diff -Nuar xc.orig/lib/Xi/XIint.h xc/lib/Xi/XIint.h
--- xc.orig/lib/Xi/XIint.h	2004-04-23 20:43:44.000000000 +0200
+++ xc/lib/Xi/XIint.h	2005-12-26 01:55:49.000000000 +0100
@@ -22,4 +22,11 @@
 	_Xconst char*
 );
 
+extern XExtensionVersion * _XiGetExtensionVersion(
+#if NeedFunctionPrototypes
+	Display*,
+	_Xconst char*
+#endif
+);
+
 #endif