diff --git a/examples/device/audio_test/src/main.c b/examples/device/audio_test/src/main.c
index c3c32b533..7f0ce3652 100644
--- a/examples/device/audio_test/src/main.c
+++ b/examples/device/audio_test/src/main.c
@@ -383,7 +383,7 @@ bool tud_audio_tx_done_pre_load_cb(uint8_t rhport, uint8_t itf, uint8_t ep_in, u
 bool tud_audio_tx_done_post_load_cb(uint8_t rhport, uint16_t n_bytes_copied, uint8_t itf, uint8_t ep_in, uint8_t cur_alt_setting)
 {
   (void) rhport;
-  (void) rhport;
+  (void) n_bytes_copied;
   (void) itf;
   (void) ep_in;
   (void) cur_alt_setting;