diff --git a/can-halal.c b/can-halal.c
index a99303a..fdb56ed 100644
--- a/can-halal.c
+++ b/can-halal.c
@@ -223,7 +223,11 @@ void HAL_FDCAN_RxFifo0Callback(FDCAN_HandleTypeDef *handle,
 #endif
 
 __weak void ftcan_msg_received_cb(uint16_t id, size_t datalen,
-                                  const uint8_t *data) {}
+                            const uint8_t *data) {
+  (void)id;
+  (void)datalen;
+  (void)data;
+}
 
 uint64_t ftcan_unmarshal_unsigned(const uint8_t **data_ptr, size_t num_bytes) {
   if (num_bytes > 8) {