AC_CHECK_HEADERS(netinet/ip_compat.h)
have_net_pfvar_h="no"
-AC_CHECK_HEADERS(net/pfvar.h, [have_net_pfvar_h="yes"])
+AC_CHECK_HEADERS(net/pfvar.h,
+ [have_net_pfvar_h="yes"],
+ [have_net_pfvar_h="no"],
+[
+#if HAVE_SYS_IOCTL_H
+# include <sys/ioctl.h>
+#endif
+#if HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#endif
+#if HAVE_NET_IF_H
+# include <net/if.h>
+#endif
+])
# For the multimeter plugin
have_termios_h="no"