diff --git a/Marlin/src/inc/Conditionals_adv.h b/Marlin/src/inc/Conditionals_adv.h
index 5f983c60f3..aa55731d90 100644
--- a/Marlin/src/inc/Conditionals_adv.h
+++ b/Marlin/src/inc/Conditionals_adv.h
@@ -1305,7 +1305,7 @@
  * currently HAL.h must be included ahead of pins.h.
  */
 #if LCD_IS_SERIAL_HOST && !defined(LCD_SERIAL_PORT)
-  #if MB(BTT_SKR_MINI_E3_V1_0, BTT_SKR_MINI_E3_V1_2, BTT_SKR_MINI_E3_V2_0, BTT_SKR_MINI_E3_V3_0, BTT_SKR_MINI_E3_V3_0_1, BTT_SKR_E3_TURBO, BTT_OCTOPUS_V1_1, AQUILA_V101)
+  #if MB(MKS_MONSTER8_V1, BTT_SKR_MINI_E3_V1_0, BTT_SKR_MINI_E3_V1_2, BTT_SKR_MINI_E3_V2_0, BTT_SKR_MINI_E3_V3_0, BTT_SKR_MINI_E3_V3_0_1, BTT_SKR_E3_TURBO, BTT_OCTOPUS_V1_1, AQUILA_V101)
     #define LCD_SERIAL_PORT 1
   #elif MB(CREALITY_V24S1_301, CREALITY_V24S1_301F4, CREALITY_F401RE, CREALITY_V423, CREALITY_CR4NTXXC10, MKS_ROBIN, PANOWIN_CUTLASS, KODAMA_BARDO)
     #define LCD_SERIAL_PORT 2