diff --git a/include/main.h b/include/main.h
index 8f0ef5c..ad8448b 100644
--- a/include/main.h
+++ b/include/main.h
@@ -37,8 +37,8 @@
 #define LED_IB GPIO_NUM_45
 
 // CAN bus for NMEA2000 connection
-#define CAN_RX GPIO_NUM_18   // D9
-#define CAN_TX GPIO_NUM_21   // D10
+#define CAN_TX GPIO_NUM_18   // D9
+#define CAN_RX GPIO_NUM_21   // D10
 #define CAN_RECOVERY_PERIOD 3000
 
 // I2C temp. sensor