diff --git a/Marlin/src/pins/stm32f1/pins_BTT_SKR_MINI_E3_V2_0.h b/Marlin/src/pins/stm32f1/pins_BTT_SKR_MINI_E3_V2_0.h
index af2821f80..c51e7f48d 100644
--- a/Marlin/src/pins/stm32f1/pins_BTT_SKR_MINI_E3_V2_0.h
+++ b/Marlin/src/pins/stm32f1/pins_BTT_SKR_MINI_E3_V2_0.h
@@ -23,6 +23,8 @@
 
 #define SKR_MINI_E3_V2
 
+#define BOARD_CUSTOM_BUILD_FLAGS -DTONE_CHANNEL=4 -DTONE_TIMER=4
+
 // Onboard I2C EEPROM
 #if NO_EEPROM_SELECTED
   #define I2C_EEPROM