diff --git a/firmware/include_board/owhw/board.h b/firmware/include_board/owhw/board.h
index a136c82b..80529cf5 100644
--- a/firmware/include_board/owhw/board.h
+++ b/firmware/include_board/owhw/board.h
@@ -44,4 +44,6 @@
 #define USB_VENDOR_ID               SIMTRACE_VENDOR_ID
 #define USB_PRODUCT_ID              SIMTRACE_PRODUCT_ID
 
+#define CARDEMU_SECOND_UART
+
 #define HAVE_CARDEM
diff --git a/firmware/src_simtrace/mode_cardemu.c b/firmware/src_simtrace/mode_cardemu.c
index 2e012372..c05c9645 100644
--- a/firmware/src_simtrace/mode_cardemu.c
+++ b/firmware/src_simtrace/mode_cardemu.c
@@ -21,7 +21,7 @@ static const Pin pin_usim1_rst	= PIN_USIM1_nRST;
 static const Pin pin_usim1_vcc	= PIN_USIM1_VCC;
 
 #ifdef CARDEMU_SECOND_UART
-static const Pin pins_usim2[]    = {PINS_USIM1};
+static const Pin pins_usim2[]    = {PINS_USIM2};
 static const Pin pin_usim2_rst	= PIN_USIM2_nRST;
 static const Pin pin_usim2_vcc	= PIN_USIM2_VCC;
 #endif
diff --git a/firmware/src_simtrace/usb.c b/firmware/src_simtrace/usb.c
index d99cce0c..c757659f 100644
--- a/firmware/src_simtrace/usb.c
+++ b/firmware/src_simtrace/usb.c
@@ -511,7 +511,7 @@ static const SIMTraceDriverConfigurationDescriptorPhone
 	{
 		sizeof(USBInterfaceDescriptor),
 		USBGenericDescriptor_INTERFACE,
-		1,	/* This is interface #0 */
+		1,	/* This is interface #1 */
 		0,	/* This is alternate setting #0 for this interface */
 		3,	/* Number of endpoints */
 		0xff,	/* Descriptor Class: Vendor specific */