diff --git a/can-halal.c b/can-halal.c
index fdb56ed..0aa55b0 100644
--- a/can-halal.c
+++ b/can-halal.c
@@ -141,10 +141,7 @@ HAL_StatusTypeDef ftcan_transmit(uint16_t id, const uint8_t *data,
   header.FDFormat = FDCAN_CLASSIC_CAN;
   header.TxEventFifoControl = FDCAN_NO_TX_EVENTS;
 
-  // HAL_FDCAN_AddMessageToTxFifoQ doesn't modify the data, but it's not marked
-  // as const for some reason.
-  uint8_t *data_nonconst = (uint8_t *)data;
-  return HAL_FDCAN_AddMessageToTxFifoQ(hcan, &header, data_nonconst);
+  return HAL_FDCAN_AddMessageToTxFifoQ(hcan, &header, data);
 }
 
 HAL_StatusTypeDef ftcan_add_filter(uint16_t id, uint16_t mask) {