diff --git a/variants/rak3172/platformio.ini b/variants/rak3172/platformio.ini
index 2cf03da2e..456697aef 100644
--- a/variants/rak3172/platformio.ini
+++ b/variants/rak3172/platformio.ini
@@ -5,9 +5,6 @@ board_upload.maximum_size = 233472 ; reserve the last 28KB for filesystem
 build_flags =
   ${stm32_base.build_flags}
   -Ivariants/rak3172
-  -DSERIAL_UART_INSTANCE=1
-  -DPIN_SERIAL_RX=PB7
-  -DPIN_SERIAL_TX=PB6
   -DHAL_DAC_MODULE_ONLY
   -DHAL_RNG_MODULE_ENABLED
   -DRADIOLIB_EXCLUDE_SX128X=1
@@ -23,5 +20,4 @@ build_flags =
   -DMESHTASTIC_EXCLUDE_POWERMON=1
   ;-DPIO_FRAMEWORK_ARDUINO_NANOLIB_FLOAT_PRINTF
   ;-DCFG_DEBUG
-
-upload_port = stlink
\ No newline at end of file
+upload_port = stlink