diff --git a/sys/dev/cardbus/if_ex_cardbus.c b/sys/dev/cardbus/if_ex_cardbus.c
index 2f667003ce5f..079fd1944439 100644
--- a/sys/dev/cardbus/if_ex_cardbus.c
+++ b/sys/dev/cardbus/if_ex_cardbus.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: if_ex_cardbus.c,v 1.12 2000/03/01 20:50:37 thorpej Exp $	*/
+/*	$NetBSD: if_ex_cardbus.c,v 1.13 2000/03/07 00:32:52 mycroft Exp $	*/
 
 /*
  * CardBus specific routines for 3Com 3C575-family CardBus ethernet adapter
@@ -258,6 +258,7 @@ ex_cardbus_attach(parent, self, aux)
 		sc->intr_ack = ex_cardbus_intr_ack;
 	}
 
+	(ct->ct_cf->cardbus_ctrl)(cc, CARDBUS_BM_ENABLE);
 	cardbus_conf_write(cc, cf, ca->ca_tag, CARDBUS_COMMAND_STATUS_REG,
 	    command);
   
diff --git a/sys/dev/cardbus/if_fxp_cardbus.c b/sys/dev/cardbus/if_fxp_cardbus.c
index 3b281ee9d623..d32ccee1b8b7 100644
--- a/sys/dev/cardbus/if_fxp_cardbus.c
+++ b/sys/dev/cardbus/if_fxp_cardbus.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: if_fxp_cardbus.c,v 1.7 2000/02/12 04:05:50 enami Exp $	*/
+/*	$NetBSD: if_fxp_cardbus.c,v 1.8 2000/03/07 00:32:52 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1999 The NetBSD Foundation, Inc.
@@ -210,6 +210,7 @@ fxp_cardbus_setup(struct fxp_softc *sc)
 	(cf->cardbus_ctrl)(cc, CARDBUS_IO_ENABLE);
 	command |= (CARDBUS_COMMAND_IO_ENABLE | CARDBUS_COMMAND_MASTER_ENABLE);
     }
+    (cf->cardbus_ctrl)(cc, CARDBUS_BM_ENABLE);
     /* enable the card */
     Cardbus_conf_write(csc->ct, tag, CARDBUS_COMMAND_STATUS_REG, command);
 }
diff --git a/sys/dev/cardbus/ohci_cardbus.c b/sys/dev/cardbus/ohci_cardbus.c
index 83d81af9c7e1..b6def62d3f09 100644
--- a/sys/dev/cardbus/ohci_cardbus.c
+++ b/sys/dev/cardbus/ohci_cardbus.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ohci_cardbus.c,v 1.4 2000/03/01 20:50:37 thorpej Exp $	*/
+/*	$NetBSD: ohci_cardbus.c,v 1.5 2000/03/07 00:32:52 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1998 The NetBSD Foundation, Inc.
@@ -149,6 +149,7 @@ ohci_cardbus_attach(parent, self, aux)
 XXX	(ct->ct_cf->cardbus_mem_open)(cc, 0, iob, iob + 0x40);
 #endif
 	(ct->ct_cf->cardbus_ctrl)(cc, CARDBUS_MEM_ENABLE);
+	(ct->ct_cf->cardbus_ctrl)(cc, CARDBUS_BM_ENABLE);
 
 	/* Enable the device. */
 	csr = cardbus_conf_read(cc, cf, ca->ca_tag,