diff --git a/variants/nrf52840/muzi_base/variant.h b/variants/nrf52840/muzi_base/variant.h
index d3e315f8b..96604c400 100644
--- a/variants/nrf52840/muzi_base/variant.h
+++ b/variants/nrf52840/muzi_base/variant.h
@@ -103,12 +103,12 @@ extern "C" {
 #define LR11X0_DIO_AS_RF_SWITCH
 
 // GPS
-#define GPS_RX_PIN (0 + 19)  // P0.19
-#define GPS_TX_PIN (0 + 20)  // P0.20
+#define GPS_RX_PIN (0 + 20)  // P0.20
+#define GPS_TX_PIN (0 + 19)  // P0.19
 #define GPS_EN_GPIO (32 + 1) // P1.01
 
-#define PIN_SERIAL1_RX GPS_TX_PIN
-#define PIN_SERIAL1_TX GPS_RX_PIN
+#define PIN_SERIAL1_RX GPS_RX_PIN
+#define PIN_SERIAL1_TX GPS_TX_PIN
 
 #define PIN_BUZZER (0 + 22) // P0.22
 
diff --git a/variants/nrf52840/t-echo/variant.h b/variants/nrf52840/t-echo/variant.h
index 8ddb1c263..b2692e448 100644
--- a/variants/nrf52840/t-echo/variant.h
+++ b/variants/nrf52840/t-echo/variant.h
@@ -187,8 +187,8 @@ External serial flash WP25R1635FZUIL0
 
 #define GPS_THREAD_INTERVAL 50
 
-#define PIN_SERIAL1_RX GPS_TX_PIN
-#define PIN_SERIAL1_TX GPS_RX_PIN
+#define PIN_SERIAL1_RX GPS_RX_PIN
+#define PIN_SERIAL1_TX GPS_TX_PIN
 
 // PCF8563 RTC Module
 #define PCF8563_RTC 0x51