diff --git a/usb_descriptors.c b/usb_descriptors.c
index 7a91e33..77c9ead 100644
--- a/usb_descriptors.c
+++ b/usb_descriptors.c
@@ -65,7 +65,7 @@ uint8_t const * tud_descriptor_configuration_cb(uint8_t index)
 
 	if ( device_state == DEVICE_ACTIVE ) {
 		uint8_t desc_initial[TUD_CONFIG_DESC_LEN+TUD_CDC_DESC_LEN+1] = {
-			TUD_CONFIG_DESCRIPTOR(1, 4+num_mounted, 0, TUD_CONFIG_DESC_LEN+TUD_CDC_DESC_LEN+num_mounted*TUD_HID_DESC_LEN, 0x00, 100),
+			TUD_CONFIG_DESCRIPTOR(1, 2+num_mounted, 0, TUD_CONFIG_DESC_LEN+TUD_CDC_DESC_LEN+num_mounted*TUD_HID_DESC_LEN, 0x00, 100),
 			TUD_CDC_DESCRIPTOR(ITF_NUM_CDC, 4, EPNUM_CDC_NOTIF, 8, EPNUM_CDC_OUT, EPNUM_CDC_IN, 64),
 		};
 		memcpy(desc_configuration, desc_initial, TUD_CONFIG_DESC_LEN+TUD_CDC_DESC_LEN);