diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index 30702b51..df06128e 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -168,6 +168,7 @@ SUPCTS	.EQU	FALSE		; SUPPRESS CTS DURING HBIOS BOOT
   #IF (FPLED_INV)
     #DEFCONT \		XOR	$FF	; INVERT BITS IF NEEDED
   #ENDIF
+  #DEFCONT \		EZ80_IO
   #DEFCONT \		OUT	(FPLED_IO),A
   #DEFCONT \		POP	AF
 #ELSE