--- lib/libxview/panel/panel_impl.h.orig	1993-06-29 07:16:50.000000000 +0200
+++ lib/libxview/panel/panel_impl.h	2003-12-30 01:31:13.000000000 +0100
@@ -9,11 +9,16 @@
 #ifndef panel_impl_defined
 #define panel_impl_defined
 
+#ifdef NULL
+#undef NULL
+#endif
 #ifndef FILE
 #ifndef SVR4
-#undef NULL
 #endif SVR4
 #include <stdio.h>
+#ifndef NULL
+#define NULL 0
+#endif
 #endif FILE
 #include <sys/types.h>
 #include <X11/Xlib.h>
