diff --git a/src/device/isapnp.c b/src/device/isapnp.c
index cb9069481..f611a18ae 100644
--- a/src/device/isapnp.c
+++ b/src/device/isapnp.c
@@ -913,11 +913,13 @@ isapnp_enable_card(void *priv, uint8_t enable)
 		card->state = (enable == 2) ? PNP_STATE_CONFIG : PNP_STATE_WAIT_FOR_KEY;
 
 		/* Invalidate other references if we're disabling this card. */
-		if (dev->isolated_card == card)
-			dev->isolated_card = NULL;
-		if (dev->current_ld_card == card) {
-			dev->current_ld = NULL;
-			dev->current_ld_card = NULL;
+		if (!card->enable) {
+			if (dev->isolated_card == card)
+				dev->isolated_card = NULL;
+			if (dev->current_ld_card == card) {
+				dev->current_ld = NULL;
+				dev->current_ld_card = NULL;
+			}
 		}
 
 		break;
diff --git a/src/sio/sio_um8669f.c b/src/sio/sio_um8669f.c
index ad3d3f5ad..2cfff686c 100644
--- a/src/sio/sio_um8669f.c
+++ b/src/sio/sio_um8669f.c
@@ -39,7 +39,7 @@
 #include <86box/isapnp.h>
 
 
-/* This ROM is reconstructed out of the several assumptions, some of which based on the IT8671F. */
+/* This ROM is reconstructed out of the several assumptions, some of which are based on the IT8671F. */
 static uint8_t um8669f_pnp_rom[] = {
     0x55, 0xa3, 0x86, 0x69, 0x00, 0x00, 0x00, 0x00, 0x00, /* UMC8669, dummy checksum (filled in by isapnp_add_card) */
     0x0a, 0x10, 0x10, /* PnP version 1.0, vendor version 1.0 */