diff --git a/Core/Src/main.c b/Core/Src/main.c
index d3c4ab3..6b9264d 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -445,9 +445,11 @@ void Error_Handler(void)
 
   //TODO: check if it is necessary to stop FreeRTOS
 
-  uint32_t error_code;
-  if (hcan == &hcan1) error_code = HAL_CAN_GetError(&hcan1);
-  else if (hcan == &hcan2) error_code = HAL_CAN_GetError(&hcan2);
+  uint32_t error_can1 == 0;
+  uint32_t error_can2 == 0;
+
+  if (HAL_CAN_GetState(&hcan1) != HAL_CAN_STATE_READY) error_code = HAL_CAN_GetError(&hcan1);
+  else if (HAL_CAN_GetState(&hcan2) != HAL_CAN_STATE_READY) error_code = HAL_CAN_GetError(&hcan2);
 
   // TODO: write error to SD and/or serial