diff --git a/Tools/Makefile.inc b/Tools/Makefile.inc
index 5a60273a..5d5062fc 100644
--- a/Tools/Makefile.inc
+++ b/Tools/Makefile.inc
@@ -35,7 +35,7 @@ DIFFPATH := $(DIFFTO)/$(RELPATH)
 CASEFN = $(TOOLS)/unix/casefn.sh
 
 ZXCC=$(BINDIR)/zx
-TASM=$(BINDIR)/uz80as
+TASM=$(BINDIR)/uz80as -t hd64180
 OPENSPIN=$(BINDIR)/openspin
 BSTC=$(BINDIR)//bstc
 CPMCP=$(BINDIR)/cpmcp