diff --git a/rtnl.c b/rtnl.c
index 251b5f3..5cddc4b 100644
--- a/rtnl.c
+++ b/rtnl.c
@@ -17,13 +17,13 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 #include <asm/types.h>
+#include <sys/socket.h> /* Must come before linux/netlink.h on some systems. */
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>
 #include <net/if.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <sys/socket.h>
 #include <unistd.h>
 
 #include "print.h"