diff --git a/configs/ez80f910200kitg/ostest/Make.defs b/configs/ez80f910200kitg/ostest/Make.defs
index 83ae3abf8f3..c7fcf2f4e60 100644
--- a/configs/ez80f910200kitg/ostest/Make.defs
+++ b/configs/ez80f910200kitg/ostest/Make.defs
@@ -147,7 +147,6 @@ endef
 
 define ASSEMBLE
 	@#echo "AS: $1"
-	@$(AS) -c $(AFLAGS) $1
 	@(wfile=`cygpath -w $1`; $(AS) $(AFLAGS) $$wfile)
 endef