diff --git a/firmware/libcommon/source/mode_cardemu.c b/firmware/libcommon/source/mode_cardemu.c
index 17039e1..46412bf 100644
--- a/firmware/libcommon/source/mode_cardemu.c
+++ b/firmware/libcommon/source/mode_cardemu.c
@@ -481,6 +481,11 @@
 		break;
 	case SIMTRACE_MSGT_DT_CEMU_CARDINSERT:
 		cardins = (struct cardemu_usb_msg_cardinsert *) msg->l2h;
+		if (!ci->pin_insert.pio) {
+			TRACE_INFO("%u: skipping unsupported card_insert to %s\r\n",
+				   ci->num, cardins->card_insert ? "INSERTED" : "REMOVED");
+			break;
+		}
 		TRACE_INFO("%u: set card_insert to %s\r\n", ci->num,
 			   cardins->card_insert ? "INSERTED" : "REMOVED");
 		if (cardins->card_insert)