diff --git a/sys/unix/Makefile.dat b/sys/unix/Makefile.dat
index 92a841a01..466a14f63 100644
--- a/sys/unix/Makefile.dat
+++ b/sys/unix/Makefile.dat
@@ -1,5 +1,4 @@
-#      NetHack Datafiles Makefile.
-HDT-Branch: NetHack-3.6.0 $:$NHDT-Revision: 1.22 $
+#      NetHack Datafiles Makefile.dat $NHDT-Date: 1447844574 2018/04/25 19:25:54 $ $NHDT-Branch: NetHack-3.6.0 $:$NHDT-Revision: 1.22 $
 # Copyright (c) 2018 by Pasi Kallinen
 # NetHack may be freely redistributed.  See license for details.