diff --git a/sys/modules/if_ef/Makefile b/sys/modules/if_ef/Makefile
index 3e6ef70075bf..8a83ac0920a3 100644
--- a/sys/modules/if_ef/Makefile
+++ b/sys/modules/if_ef/Makefile
@@ -5,18 +5,19 @@
 KMOD=	if_ef
 SRCS=	if_ef.c opt_ipx.h opt_inet.h opt_ef.h
 
-# If you need only limited number of frames comment out unneeded ones
-# this will reduce number of visible devices
-ETHER_II=
-ETHER_8023=
-ETHER_8022=
-ETHER_SNAP=
-
 .if defined(EFDEBUG)
 CFLAGS+= -DEF_DEBUG
 .endif
 
 .if !defined(KERNBUILDDIR)
+# If you need only a limited number of frames, uncomment the needed ones.
+# This will reduce the number of visible devices.  Note that the module
+# will support all frames by default, i.e., when all are commented here.
+#ETHER_II=
+#ETHER_8023=
+#ETHER_8022=
+#ETHER_SNAP=
+
 opt_inet.h:
 	echo "#define INET 1" > opt_inet.h
 
@@ -24,6 +25,7 @@ opt_ipx.h:
 	echo "#define IPX 1" > opt_ipx.h
 
 opt_ef.h:
+	touch opt_ef.h
 .for frame in ETHER_II ETHER_8023 ETHER_8022 ETHER_SNAP
 .if defined(${frame})
 	echo "#define ${frame} 1" >> opt_ef.h