diff --git a/swh/model/model.py b/swh/model/model.py
--- a/swh/model/model.py
+++ b/swh/model/model.py
@@ -514,6 +514,7 @@
     SUBVERSION = "svn"
     MERCURIAL = "hg"
     CVS = "cvs"
+    BAZAAR = "bzr"
 
 
 def tuplify_extra_headers(value: Iterable):