diff --git a/sys/dev/mca/files.mca b/sys/dev/mca/files.mca
index 0b564699eb4d..7323008f7b44 100644
--- a/sys/dev/mca/files.mca
+++ b/sys/dev/mca/files.mca
@@ -1,4 +1,4 @@
-# $NetBSD: files.mca,v 1.4 2001/03/19 21:56:44 jdolecek Exp $
+# $NetBSD: files.mca,v 1.5 2001/03/19 21:58:09 jdolecek Exp $
 #
 # Config.new file and device description for machine-independent MCA code.
 # Included by ports that need it.
@@ -10,11 +10,6 @@ attach	mca at mcabus
 file	dev/mca/mca.c			mca			needs-flag
 file	dev/mca/mca_subr.c		mca
 
-# 3Com 3C523 - new in 3.0, dissapeared in 3.1; re-port from isa attach
-# device	ef: ether, ifnet, arp, elink, i82586
-attach	ef at mca with ef_mca
-file	dev/mca/if_ef_mca.c		ef_mca
-
 # 3Com 3C529 (not yet)
 #attach	ep at mca with ep_mca: elink
 #file	dev/mca/if_ep_mca.c		ep_mca