Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -1404,11 +1404,16 @@
 	AC_CHECK_HEADER(netinet/tcp.h, [
 		AC_DEFINE(OF_HAVE_NETINET_TCP_H, 1,
 			[Whether we have netinet/tcp.h])
 	])
 	AC_CHECK_HEADERS([arpa/inet.h netdb.h sys/sockio.h])
-	AC_CHECK_HEADERS([net/if.h net/if_arp.h net/if_dl.h net/if_types.h])
+	AC_CHECK_HEADERS([net/if.h], [], [], [
+		#ifdef OF_HAVE_SYS_SOCKET_H
+		# include <sys/socket.h>
+		#endif
+	])
+	AC_CHECK_HEADERS([net/if_arp.h net/if_dl.h net/if_types.h])
 	AC_CHECK_FUNCS([if_indextoname if_nametoindex if_nameindex])
 	AC_CHECK_TYPES([struct sockaddr_dl], [], [], [
 		#ifdef HAVE_SYS_TYPES_H
 		# include <sys/types.h>
 		#endif