diff --git a/news/6136.bugfix.rst b/news/6136.bugfix.rst
new file mode 100644
index 000000000..6ddd3742c
--- /dev/null
+++ b/news/6136.bugfix.rst
@@ -0,0 +1 @@
+Fix a bug that vcs subdependencies were locked without their subdirectory fragment if they had one
diff --git a/pipenv/utils/locking.py b/pipenv/utils/locking.py
index 019036b00..771466b5e 100644
--- a/pipenv/utils/locking.py
+++ b/pipenv/utils/locking.py
@@ -14,6 +14,7 @@
     clean_resolved_dep,
     determine_vcs_revision_hash,
     expansive_install_req_from_line,
+    normalize_vcs_url,
     pep423_name,
     translate_markers,
 )
@@ -61,9 +62,16 @@ def format_requirement_for_lockfile(
     if req.link and req.link.is_vcs:
         vcs = req.link.scheme.split("+", 1)[0]
         entry["ref"] = determine_vcs_revision_hash(req, vcs, pipfile_entry.get("ref"))
-        entry[vcs] = original_deps.get(name, req.link.url)
+
+        if name in original_deps:
+            entry[vcs] = original_deps[name]
+        else:
+            vcs_url, _ = normalize_vcs_url(req.link.url)
+            entry[vcs] = vcs_url
         if pipfile_entry.get("subdirectory"):
             entry["subdirectory"] = pipfile_entry["subdirectory"]
+        elif req.link.subdirectory_fragment:
+            entry["subdirectory"] = req.link.subdirectory_fragment
     if req.req:
         entry["version"] = str(req.specifier)
     elif version:
diff --git a/tests/integration/test_lock.py b/tests/integration/test_lock.py
index 99f5cd559..4d6fc3387 100644
--- a/tests/integration/test_lock.py
+++ b/tests/integration/test_lock.py
@@ -532,7 +532,8 @@ def test_lock_nested_vcs_direct_url(pipenv_instance_pypi):
         assert "git" in p.lockfile["default"]["pep508-package"]
         assert "sibling-package" in p.lockfile["default"]
         assert "git" in p.lockfile["default"]["sibling-package"]
-        assert "subdirectory" in p.lockfile["default"]["sibling-package"]["git"]
+        assert "subdirectory" in p.lockfile["default"]["sibling-package"]
+        assert p.lockfile["default"]["sibling-package"]["subdirectory"] == "parent_folder/sibling_package"
         assert "version" not in p.lockfile["default"]["sibling-package"]