diff --git a/manual/config/dbhelper.vim b/manual/config/dbhelper.vim
index 4f6d61c81d..ce328750ea 100644
--- a/manual/config/dbhelper.vim
+++ b/manual/config/dbhelper.vim
@@ -93,6 +93,7 @@ imap<leader>gs <glossseealso></glossseealso><esc>bba
 
 " index
 imap<leader>it <indexterm><CR><primary></primary><CR></indexterm><esc>k$bba
+imap<leader>is <secondary></secondary><esc>bba
 
 " admonitions
 imap<leader>no <note><CR><para></para><CR></note><esc>k$bba