diff --git a/ubuntutools/archive.py b/ubuntutools/archive.py
index e0bade6..54f9b9e 100644
--- a/ubuntutools/archive.py
+++ b/ubuntutools/archive.py
@@ -359,7 +359,7 @@ class DebianSourcePackage(SourcePackage):
                 yield it.next()
             except StopIteration:
                 break
-        if self._snapshot_list:
+        if self.snapshot_list:
             yield self._snapshot_url(name)
 
     def pull_dsc(self):