diff --git a/archive/ndslr4.com/Makefile b/archive/ndslr4.com/Makefile
index 63a7216..09f3e42 100644
--- a/archive/ndslr4.com/Makefile
+++ b/archive/ndslr4.com/Makefile
@@ -14,4 +14,4 @@ old: directory
 	make -C $@
 
 extdata: directory
-	cp readme.txt $(OUT)/$(BASE)
+	cp README.txt $(OUT)/$(BASE)