diff --git a/debian/changelog b/debian/changelog
index 5abe047..b439f46 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+kparts (5.78.0-4) UNRELEASED; urgency=medium
+
+  * Apply multi-arch hints.
+    + libkf5parts-dev, libkf5parts-plugins: Add Multi-Arch: same.
+
+ -- Debian Janitor <janitor@jelmer.uk>  Wed, 17 Mar 2021 02:01:20 -0000
+
 kparts (5.78.0-3) unstable; urgency=medium
 
   * Remove graphviz from build depends.
diff --git a/debian/control b/debian/control
index 8d6032d..72ea75f 100644
--- a/debian/control
+++ b/debian/control
@@ -56,6 +56,7 @@ Breaks: kross-dev (<< 5.54),
         libkf5texteditor-dev (<< 5.54)
 Replaces: libkf5parts-data (<< 5.69.0-2~)
 Recommends: libkf5parts-doc (= ${source:Version})
+Multi-Arch: same
 Description: development files for kparts
  Framework providing elaborate user-interface components.
  .
@@ -74,6 +75,7 @@ Section: doc
 Package: libkf5parts-plugins
 Architecture: any
 Depends: ${misc:Depends}, ${shlibs:Depends}
+Multi-Arch: same
 Description: Document centric plugin system.
  Framework providing elaborate user-interface components.
  .