diff --git a/lib/ChangeLog b/lib/ChangeLog
index 5666cba..4360c83 100644
--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,3 +1,7 @@
+2007-05-10 Paul Jakma <paul.jakma@sun.com>
+
+	* zebra.h: Don't try define _GNU_SOURCE, autoconf should do it.
+
 2007-05-03 Paul Jakma <paul.jakma@sun.com>
 
 	* memtypes.c: Add MTYPE_ATTR_EXTRA and MTYPE_BGP_ROUTE_EXTRA
diff --git a/lib/zebra.h b/lib/zebra.h
index 3c01aec..2451dbe 100644
--- a/lib/zebra.h
+++ b/lib/zebra.h
@@ -25,10 +25,6 @@
 #include "config.h"
 #endif /* HAVE_CONFIG_H */
 
-#ifdef GNU_LINUX
-#define _GNU_SOURCE
-#endif /* GNU_LINUX */
-
 #ifdef SUNOS_5
 #define _XPG4_2
 #define __EXTENSIONS__