diff --git a/subcmds/download.py b/subcmds/download.py
old mode 100644
new mode 100755
index e1010aa..384af78
--- a/subcmds/download.py
+++ b/subcmds/download.py
@@ -62,6 +62,14 @@
           ps_id = int(m.group(2))
         else:
           ps_id = 1
+          regex = r'refs/changes/%2.2d/%d/(\d+)' % (chg_id % 100, chg_id)
+          output = project._LsRemote()
+          if output:
+            rcomp = re.compile(regex, re.I)
+            for line in output.splitlines():
+              match = rcomp.search(line)
+              if match:
+                ps_id = max(int(match.group(1)), ps_id)
         to_get.append((project, chg_id, ps_id))
       else:
         project = self.GetProjects([a])[0]