diff --git a/debian/lib/python/debian_linux/debian.py b/debian/lib/python/debian_linux/debian.py
index 0d4d0299a..ad8e70219 100644
--- a/debian/lib/python/debian_linux/debian.py
+++ b/debian/lib/python/debian_linux/debian.py
@@ -140,7 +140,7 @@ class VersionLinux(Version):
     )
     |
     (?P<revision_backports>
-        ~bpo\d\d\+\d+
+        ~bpo\d+\+\d+
     )
     |
     (?P<revision_other>