diff --git a/src/poetry/console/commands/add.py b/src/poetry/console/commands/add.py
index e02af59caa0..a5fcbc7a2ca 100644
--- a/src/poetry/console/commands/add.py
+++ b/src/poetry/console/commands/add.py
@@ -79,6 +79,8 @@ class AddCommand(InstallerCommand, InitCommand):
   - A git url (<b>git+https://github.com/python-poetry/poetry.git</b>)
   - A git url with a revision\
  (<b>git+https://github.com/python-poetry/poetry.git#develop</b>)
+  - A subdirectory of a git repository\
+ (<b>git+https://github.com/python-poetry/poetry.git#subdirectory=tests/fixtures/sample_project</b>)
   - A git SSH url (<b>git+ssh://github.com/python-poetry/poetry.git</b>)
   - A git SSH url with a revision\
  (<b>git+ssh://github.com/python-poetry/poetry.git#develop</b>)