diff --git a/firmware/main/hal/u8g2_esp32_hal.h b/firmware/main/hal/u8g2_esp32_hal.h
index 814a14c..9601892 100644
--- a/firmware/main/hal/u8g2_esp32_hal.h
+++ b/firmware/main/hal/u8g2_esp32_hal.h
@@ -9,6 +9,8 @@
 
 #ifndef U8G2_ESP32_HAL_H_
 #define U8G2_ESP32_HAL_H_
+
+#include "soc/soc_caps.h"
 #include "u8g2.h"
 
 #include "driver/gpio.h"
@@ -17,7 +19,7 @@
 
 #define U8G2_ESP32_HAL_UNDEFINED GPIO_NUM_NC
 
-#if SOC_I2C_NUM > 1
+#if defined(SOC_I2C_NUM) && SOC_I2C_NUM > 1
 #define I2C_MASTER_NUM I2C_NUM_1 //  I2C port number for master dev
 #else
 #define I2C_MASTER_NUM I2C_NUM_0 //  I2C port number for master dev