diff --git a/mcufriend_special.h b/mcufriend_special.h
index 6621958..812acd0 100644
--- a/mcufriend_special.h
+++ b/mcufriend_special.h
@@ -7,7 +7,7 @@
 //#define USE_MEGA_8BIT_SHIELD
 //#define USE_MEGA_16BIT_SHIELD     //RD on PL6 (D43)
 //#define USE_BLD_BST_MEGA32U4
-#define USE_BLD_BST_MEGA2560
+//#define USE_BLD_BST_MEGA2560
 //#define USE_DUE_8BIT_PROTOSHIELD
 //#define USE_DUE_16BIT_SHIELD        //RD on PA15 (D24)