diff --git a/Core/Src/cansend.c b/Core/Src/cansend.c
index 720e4f0..2c82448 100644
--- a/Core/Src/cansend.c
+++ b/Core/Src/cansend.c
@@ -110,7 +110,7 @@ void vUARTLogger(void *argument)
       if (osMessageQueueGet(xUARTQueue, &message, NULL, osWaitForever) == osOK)
       {
         DEBUG_PRINT("CAN frame detected\r\n");
-        format_can_message(tx_buffer, message.source, &message);
+        int len = format_can_message(tx_buffer, message.source, &message);
         HAL_UART_Transmit_DMA(&huart1, (uint8_t*)tx_buffer, len);
         osSemaphoreAcquire(xUARTDMASemaphore, osWaitForever);
         DEBUG_PRINT("CAN frame sent via UART\r\n");