diff -Nru libnl-1.1.orig//lib/route/link/vlan.c libnl-1.1/lib/route/link/vlan.c
--- libnl-1.1.orig//lib/route/link/vlan.c	2010-04-30 17:34:00.305578537 +0200
+++ libnl-1.1/lib/route/link/vlan.c	2010-04-30 17:34:29.563827551 +0200
@@ -28,9 +28,11 @@
 
 #include <linux/if_vlan.h>
 
+#ifndef _LINUX_IF_VLAN_H_
 enum vlan_flags {
         VLAN_FLAG_REORDER_HDR = 0x1,
 };
+#endif
 
 /** @cond SKIP */
 #define VLAN_HAS_ID		(1<<0)