diff --git a/Documentation/glossary-content.txt b/Documentation/glossary-content.txt
index dba5062b37..0273095eb4 100644
--- a/Documentation/glossary-content.txt
+++ b/Documentation/glossary-content.txt
@@ -486,7 +486,7 @@ should not be combined with other pathspec.
 	with refs to the associated blob and/or tree objects. A
 	<<def_tree,tree>> is equivalent to a <<def_directory,directory>>.
 
-[[def_tree-ish]]tree-ish::
+[[def_tree-ish]]tree-ish (also treeish)::
 	A <<def_ref,ref>> pointing to either a <<def_commit_object,commit
 	object>>, a <<def_tree_object,tree object>>, or a <<def_tag_object,tag
 	object>> pointing to a tag or commit or tree object.