diff --git a/docs/layers/gtags.md b/docs/layers/gtags.md
index 5fb03157f..d47a3dbe2 100644
--- a/docs/layers/gtags.md
+++ b/docs/layers/gtags.md
@@ -94,6 +94,7 @@ gtags layer provides the following options:
 
 - `auto_update`: Update gtags/ctags database automatically when save a file. Default is `true`.
 - `tags_cache_dir`: Setting the cache directory of tags. The default value is `~/.cache/SpaceVim/tags/`
+- `ctags_bin`: Setting the command or path of ctags. Default is `ctags`.
 
 ## Language Support