--- mgv-3.1.5/wlib/wlib/sanity.h	1998-08-27 04:22:41.000000000 +0100
+++ mgv-3.1.5-new/wlib/wlib/sanity.h	2003-03-29 22:13:37.000000000 +0000
@@ -25,6 +25,7 @@
 #define	WLIB_SANITY_H
 MU_HID(wlib_sanity_h, "$Mu: wlib/wlib/sanity.h 1.6 1998/08/27 03:22:41 $")
 
+#include <stdio.h>
 #include <assert.h>
 
 #define	ARGSANITY(a,n)	assert((size_t)(n) <= sizeof(a)/sizeof((a)[0]))