diff --git a/libraries/AP_HAL_ChibiOS/hwdef/HolybroG4_GPS/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/HolybroG4_GPS/hwdef.dat
index 226bb3d0f9..bb27ad6823 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/HolybroG4_GPS/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/HolybroG4_GPS/hwdef.dat
@@ -67,14 +67,14 @@ PA14 JTCK-SWCLK SWD
 PB7 I2C1_SDA I2C1
 PB8 I2C1_SCL I2C1
 
-# I2C2 bus (unused)
-#PA8 I2C2_SDA I2C2
-#PA9 I2C2_SCL I2C2
+# I2C2 bus (LED Driver)
+PA8 I2C2_SDA I2C2
+PA9 I2C2_SCL I2C2
 
 define HAL_I2C_INTERNAL_MASK 3
 
 # I2C buses
-I2C_ORDER I2C1
+I2C_ORDER I2C1 I2C2
 
 # one SPI bus (for IMU, unused)
 #PA5 SPI1_SCK SPI1