Index: net.c
===================================================================
--- net.c	(revision 218)
+++ net.c	(working copy)
@@ -121,6 +121,12 @@
 #include <unistd.h>
 #endif
 
+#ifdef HAVE_STDDEF_H
+#include <stddef.h>
+#else
+#define offsetof(st, m) ((size_t) ( (char *)&((st *)(0))->m - (char *)0 ))
+#endif
+
 #ifdef HAVE_SYS_STAT_H
 #include <sys/stat.h>
 #endif
Index: configure.ac
===================================================================
--- configure.ac	(revision 218)
+++ configure.ac	(working copy)
@@ -115,6 +115,7 @@
 	setjmp.h \
 	signal.h \
 	stdarg.h \
+        stddef.h \
 	stdio.h \
 	string.h \
 	strings.h \