diff --git a/sys/winnt/Makefile.bcc b/sys/winnt/Makefile.bcc
index eedb9850c..4190cd7d3 100644
--- a/sys/winnt/Makefile.bcc
+++ b/sys/winnt/Makefile.bcc
@@ -534,6 +534,7 @@ $(O)install.tag: 	$(DAT)\data	$(DAT)\rumors	 $(DAT)\dungeon \
 ! IF ("$(USE_DLB)"=="Y")
 	copy nhdat                $(GAMEDIR)
 	copy $(DAT)\license       $(GAMEDIR)
+	copy $(DAT)\opthelp       $(GAMEDIR)
 ! ELSE
 	copy $(DAT)\*.            $(GAMEDIR)
 	copy $(DAT)\*.dat         $(GAMEDIR)
diff --git a/sys/winnt/Makefile.gcc b/sys/winnt/Makefile.gcc
index 42bbf95b8..e1871c1b4 100644
--- a/sys/winnt/Makefile.gcc
+++ b/sys/winnt/Makefile.gcc
@@ -498,6 +498,7 @@ $(O)install.tag:  $(DAT)/data    $(DAT)/rumors    $(DAT)/dungeon \
 ifeq  "$(USE_DLB)" "Y"
 	$(subst /,\,copy nhdat                $(GAMEDIR))
 	$(subst /,\,copy $(DAT)/license       $(GAMEDIR))
+	$(subst /,\,copy $(DAT)/opthelp       $(GAMEDIR))
 else
 	$(subst /,\,copy $(DAT)/*.            $(GAMEDIR))
 	$(subst /,\,copy $(DAT)/*.dat         $(GAMEDIR))
diff --git a/sys/winnt/Makefile.msc b/sys/winnt/Makefile.msc
index d5a6e2c1b..03a251728 100644
--- a/sys/winnt/Makefile.msc
+++ b/sys/winnt/Makefile.msc
@@ -469,6 +469,7 @@ $(O)install.tag: 	$(DAT)\data	$(DAT)\rumors	 $(DAT)\dungeon \
 ! IF ("$(USE_DLB)"=="Y")
 	copy nhdat                $(GAMEDIR)
 	copy $(DAT)\license       $(GAMEDIR)
+	copy $(DAT)\opthelp       $(GAMEDIR)
 ! ELSE
 	copy $(DAT)\*.            $(GAMEDIR)
 	copy $(DAT)\*.dat         $(GAMEDIR)