diff --git a/makefile.mingw b/makefile.mingw
index ad1fe900e..82f71fe06 100644
--- a/makefile.mingw
+++ b/makefile.mingw
@@ -274,7 +274,7 @@ ifdef ROM_VERIFY
 	DEF	:= $(DEF) -DROM_VERIFY
 endif
 
-ifdef ROM_VERIFY
+ifdef LSB_FIRST
 	DEF	:= $(DEF) -DLSB_FIRST
 endif