diff --git a/src/rp2_common/pico_stdio_usb/reset_interface.c b/src/rp2_common/pico_stdio_usb/reset_interface.c
index 1232857..ccd5758 100644
--- a/src/rp2_common/pico_stdio_usb/reset_interface.c
+++ b/src/rp2_common/pico_stdio_usb/reset_interface.c
@@ -100,7 +100,7 @@ usbd_class_driver_t const *usbd_app_driver_get_cb(uint8_t *driver_count) {
 
 #if PICO_STDIO_USB_ENABLE_RESET_VIA_BAUD_RATE
 // Support for default BOOTSEL reset by changing baud rate
-void tud_cdc_line_coding_cb(uint8_t itf, cdc_line_coding_t const* p_line_coding) {
+void tud_cdc_line_coding_cb(__unused uint8_t itf, cdc_line_coding_t const* p_line_coding) {
     if (p_line_coding->bit_rate == PICO_STDIO_USB_RESET_MAGIC_BAUD_RATE) {
 #ifdef PICO_STDIO_USB_RESET_BOOTSEL_ACTIVITY_LED
         const uint gpio_mask = 1u << PICO_STDIO_USB_RESET_BOOTSEL_ACTIVITY_LED;
diff --git a/src/rp2_common/pico_stdio_usb/stdio_usb_descriptors.c b/src/rp2_common/pico_stdio_usb/stdio_usb_descriptors.c
index faec490..d06d700 100644
--- a/src/rp2_common/pico_stdio_usb/stdio_usb_descriptors.c
+++ b/src/rp2_common/pico_stdio_usb/stdio_usb_descriptors.c
@@ -115,12 +115,11 @@ const uint8_t *tud_descriptor_device_cb(void) {
     return (const uint8_t *)&usbd_desc_device;
 }
 
-const uint8_t *tud_descriptor_configuration_cb(uint8_t index) {
-    (void)index;
+const uint8_t *tud_descriptor_configuration_cb(__unused uint8_t index) {
     return usbd_desc_cfg;
 }
 
-const uint16_t *tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
+const uint16_t *tud_descriptor_string_cb(uint8_t index, __unused uint16_t langid) {
     #define DESC_STR_MAX (20)
     static uint16_t desc_str[DESC_STR_MAX];