--- libnl-1.1.orig/lib/netfilter/log.c
+++ libnl-1.1/lib/netfilter/log.c
@@ -18,6 +18,7 @@
  * @{
  */
 
+#include <byteswap.h>
 #include <sys/types.h>
 #include <linux/netfilter/nfnetlink_log.h>