diff --git a/mercurial/revset.py b/mercurial/revset.py
--- a/mercurial/revset.py
+++ b/mercurial/revset.py
@@ -1928,7 +1928,8 @@ def _list(repo, subset, x):
         r = repo[t].rev()
         if r in seen:
             continue
-        if r in subset:
+        if (r in subset
+            or r == node.nullrev and isinstance(subset, fullreposet)):
             ls.append(r)
         seen.add(r)
     return baseset(ls)