diff --git a/Makefile-dsk.mk b/Makefile-dsk.mk
index 7cfd28c..67b95de 100644
--- a/Makefile-dsk.mk
+++ b/Makefile-dsk.mk
@@ -17,5 +17,5 @@ dsk: $(DSK)
 
 $(DSK): cc65-Chess.apple2
 	$(call CP, apple2/template.dsk $@)
-	java -jar $(AC) -p  $@ chess.system sys < $(shell cl65 --print-target-path)/apple2/util/loader.system
+	java -jar $(AC) -p  $@ chess.system sys < $(subst \,/,$(shell cl65 --print-target-path)/apple2/util/loader.system)
 	java -jar $(AC) -as $@ chess        bin < cc65-Chess.apple2