--- options.h	2011-03-03 15:29:36.000000000 +0100
+++ options.h	2011-03-03 15:30:28.000000000 +0100
@@ -144,7 +144,9 @@
 #endif
 
 /* Whether to do reverse DNS lookups. */
+#ifndef NO_HOST_LOOKUP
 #define DO_HOST_LOOKUP
+#endif
 
 /* Whether to print the message of the day (MOTD). This doesn't add much code
  * size */