updated for version 7.1-217
diff --git a/runtime/doc/Makefile b/runtime/doc/Makefile
index 83eb9e4..ad08a87 100644
--- a/runtime/doc/Makefile
+++ b/runtime/doc/Makefile
@@ -301,7 +301,7 @@
# Use Vim to generate the tags file. Can only be used when Vim has been
# compiled and installed. Supports multiple languages.
vimtags: $(DOCS)
- $(VIMEXE) -u NONE -esX -c "helptags ." -c quit
+ $(VIMEXE) -u NONE -esX -c "helptags ++t ." -c quit
# Use "doctags" to generate the tags file. Only works for English!
tags: doctags $(DOCS)