diff --git a/variants/rak11200/RAK11200Board.h b/variants/rak11200/RAK11200Board.h
index ecd00fba9..61d6b8681 100644
--- a/variants/rak11200/RAK11200Board.h
+++ b/variants/rak11200/RAK11200Board.h
@@ -4,7 +4,7 @@
 #include <helpers/ESP32Board.h>
 
 // LoRa radio module pins when paired with the RAK13300 SX1262 module
-#define  P_LORA_DIO_1   22    // GPIO22 (ESP32 pin 36 -> IO6/DIO1)
+// P_LORA_DIO_1 is defined as a build flag (platformio.ini) so the base ESP32Board.h sees it
 #define  P_LORA_NSS     32    // GPIO32 (ESP32 pin 8 -> SPI_CS)
 #define  P_LORA_RESET   23    // GPIO23 (ESP32 pin 37 -> IO4/NRESET)
 #define  P_LORA_BUSY    13    // GPIO13 (ESP32 pin 16 -> IO5)
diff --git a/variants/rak11200/platformio.ini b/variants/rak11200/platformio.ini
index b362d6c61..21631bc31 100644
--- a/variants/rak11200/platformio.ini
+++ b/variants/rak11200/platformio.ini
@@ -16,6 +16,7 @@ build_flags =
   -D PIN_OLED_RESET=-1
   -D RADIO_CLASS=CustomSX1262
   -D WRAPPER_CLASS=CustomSX1262Wrapper
+  -D P_LORA_DIO_1=22 ; GPIO22 (ESP32 pin 36 -> IO6/DIO1); build flag so base ESP32Board.h getIRQGpio() sees it
   -D LORA_TX_POWER=22
   -D SX126X_CURRENT_LIMIT=140
   -D SX126X_DIO2_AS_RF_SWITCH=true