diff --git a/main/ugv_io_gps.cc b/main/ugv_io_gps.cc
index 4ad4f84..7514c95 100644
--- a/main/ugv_io_gps.cc
+++ b/main/ugv_io_gps.cc
@@ -63,7 +63,7 @@ void UART_GPS::Init() {
     ESP_LOGE(TAG, "uart_param_config: %d", ret);
     return;
   }
-  uart_set_pin(GPS_UART, GPS_UART_TX_PIN, GPS_UART_TX_PIN, UART_PIN_NO_CHANGE,
+  uart_set_pin(GPS_UART, GPS_UART_TX_PIN, GPS_UART_RX_PIN, UART_PIN_NO_CHANGE,
                UART_PIN_NO_CHANGE);
   ret = uart_driver_install(GPS_UART, GPS_UART_RX_BUF_SIZE,
                             GPS_UART_TX_BUF_SIZE, GPS_UART_QUEUE_SIZE, NULL, 0);