--- src/NameResolver.h.orig	2006-08-17 22:25:35.000000000 +0200
+++ src/NameResolver.h	2006-08-17 22:25:56.000000000 +0200
@@ -37,6 +37,8 @@
 } /* end of extern "C" */
 #endif
 
+void callback(void* arg, int status, struct hostent* host);
+
 class NameResolver {
   friend void callback(void* arg, int status, struct hostent* host);