Index: head/sys/conf/kmod.mk
===================================================================
--- head/sys/conf/kmod.mk
+++ head/sys/conf/kmod.mk
@@ -157,7 +157,7 @@
 CLEANFILES+=	${KMOD:S/$/.c/}
 
 .for _firmw in ${FIRMWS}
-${_firmw:C/\:.*$/.fwo/}:	${_firmw:C/\:.*$//}
+${_firmw:C/\:.*$/.fwo/:T}:	${_firmw:C/\:.*$//}
 	@${ECHO} ${_firmw:C/\:.*$//} ${.ALLSRC:M*${_firmw:C/\:.*$//}}
 	@if [ -e ${_firmw:C/\:.*$//} ]; then			\
 		${LD} -b binary --no-warn-mismatch ${_LDFLAGS}	\
@@ -169,7 +169,7 @@
 		rm ${_firmw:C/\:.*$//};				\
 	fi
 
-OBJS+=	${_firmw:C/\:.*$/.fwo/}
+OBJS+=	${_firmw:C/\:.*$/.fwo/:T}
 .endfor
 .endif