diff -Naur tor-0.1.1.23/src/common/compat.h tor-0.1.1.23_patched/src/common/compat.h
--- tor-0.1.1.23/src/common/compat.h	2006-07-25 05:52:47.000000000 +0200
+++ tor-0.1.1.23_patched/src/common/compat.h	2006-09-04 22:26:42.000000000 +0200
@@ -31,10 +31,6 @@
 #endif
 #include <stdarg.h>
 
-#ifndef NULL_REP_IS_ZERO_BYTES
-#error "It seems your platform does not represent NULL as zero. We can't cope."
-#endif
-
 /* ===== Compiler compatibility */
 
 /* GCC can check printf types on arbitrary functions. */