diff --git a/vcs/backends/git/workdir.py b/vcs/backends/git/workdir.py
index b53e943..7766f30 100644
--- a/vcs/backends/git/workdir.py
+++ b/vcs/backends/git/workdir.py
@@ -20,8 +20,8 @@ def get_branch(self):
             raise RepositoryError("Couldn't compute workdir's branch")
 
     def get_changeset(self):
-        return self.repository.get_changeset(
-            self.repository._repo.refs.as_dict().get('HEAD'))
+        wk_dir_id = self.repository._repo.refs.as_dict().get('HEAD')
+        return self.repository.get_changeset(wk_dir_id)
 
     def checkout_branch(self, branch=None):
         if branch is None:
diff --git a/vcs/backends/hg/workdir.py b/vcs/backends/hg/workdir.py
index 5754c46..44e672b 100644
--- a/vcs/backends/hg/workdir.py
+++ b/vcs/backends/hg/workdir.py
@@ -10,7 +10,8 @@ def get_branch(self):
         return self.repository._repo.dirstate.branch()
 
     def get_changeset(self):
-        return self.repository.get_changeset()
+        wk_dir_id = self.repository._repo[None].parents()[0].hex()
+        return self.repository.get_changeset(wk_dir_id)
 
     def checkout_branch(self, branch=None):
         if branch is None: