diff --git a/debian/changelog b/debian/changelog
index a10ad6e..cf9aeb1 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+python-castellan (3.7.1-2) UNRELEASED; urgency=medium
+
+  * Apply multi-arch hints.
+    + python-castellan-doc: Add Multi-Arch: foreign.
+
+ -- Debian Janitor <janitor@jelmer.uk>  Sun, 11 Jul 2021 00:10:27 -0000
+
 python-castellan (3.7.1-1) experimental; urgency=medium
 
   * New upstream release.
diff --git a/debian/control b/debian/control
index e0ce67a..b5bd3ae 100644
--- a/debian/control
+++ b/debian/control
@@ -44,6 +44,7 @@
 Depends:
  ${misc:Depends},
  ${sphinxdoc:Depends},
+Multi-Arch: foreign
 Description: generic key manager interface for OpenStack - doc
  The Castellan module provides a generic key manager interface so that
  OpenStack projects can use Barbican, but also have the flexibilty to choose an