diff --git a/Source/Apps/Dev/Makefile b/Source/Apps/Dev/Makefile
index 1328720e..deb22e49 100644
--- a/Source/Apps/Dev/Makefile
+++ b/Source/Apps/Dev/Makefile
@@ -4,4 +4,6 @@ TOOLS = ../../../Tools
 OTHERS = *.hex
 NODELETE = *.ovr *.doc *.hlp
 
+USETASM=1
+
 include $(TOOLS)/Makefile.inc