diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index 8ec7b166..c1580ac9 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -2066,6 +2066,8 @@ HB_Z280BUS1:
 	CALL	PRTHEXWORDHL
 #ENDIF
 ;
+#IFDEF ROMBOOT
+;
 ; ROM CHECKSUM VERIFICATION
 ; EACH OF THE FIRST 4 ROM BANKS HAS A CHECKSUM INJECTED SUCH THAT
 ; A COMPUTED CHECKSUM ACROSS THE ENTIRE BANK SHOLD ALWAYS BE ZERO