diff --git a/sys/modules/wlan/Makefile b/sys/modules/wlan/Makefile
index f07fbc3edce..d2aa5c7dce7 100644
--- a/sys/modules/wlan/Makefile
+++ b/sys/modules/wlan/Makefile
@@ -5,9 +5,12 @@
 KMOD=	wlan
 SRCS=	ieee80211.c ieee80211_crypto.c ieee80211_input.c ieee80211_ioctl.c \
 	ieee80211_node.c ieee80211_output.c ieee80211_proto.c
-SRCS+=	bus_if.h device_if.h opt_inet.h
+SRCS+=	bus_if.h device_if.h opt_inet.h opt_ipx.h
 
 opt_inet.h:
 	echo "#define INET 1" > opt_inet.h
 
+opt_ipx.h:
+	echo "#define IPX 1" > opt_ipx.h
+
 .include <bsd.kmod.mk>