diff --git a/Platformio/hardware/ESP32/infrared_receiver_hal_esp32.h b/Platformio/hardware/ESP32/infrared_receiver_hal_esp32.h
index 378b0d6..73979aa 100644
--- a/Platformio/hardware/ESP32/infrared_receiver_hal_esp32.h
+++ b/Platformio/hardware/ESP32/infrared_receiver_hal_esp32.h
@@ -1,5 +1,6 @@
 #pragma once
 
+extern uint8_t IR_RX_GPIO;
 extern uint8_t IR_VCC_GPIO;
 
 #include <string>