diff --git a/Core/Src/cansend.c b/Core/Src/cansend.c
index 3a9f4dc..79327f2 100644
--- a/Core/Src/cansend.c
+++ b/Core/Src/cansend.c
@@ -92,7 +92,11 @@ static int format_can_message(char *buf, uint8_t source, const CanMessage_t *mes
   */
 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
 {
-  if (huart->Instance == USART1) osSemaphoreRelease(xUARTDMASemaphore);
+  if (huart->Instance == USART1)
+  {
+    huart->gState = HAL_UART_STATE_READY;
+    osSemaphoreRelease(xUARTDMASemaphore);
+  }
 }
 /* END HAL_UART_TxCpltCallback */