diff -Nru dials-3.12.1+dfsg3/debian/changelog dials-3.12.1+dfsg3/debian/changelog
--- dials-3.12.1+dfsg3/debian/changelog	2023-02-06 12:32:34.000000000 +0000
+++ dials-3.12.1+dfsg3/debian/changelog	2023-02-08 16:40:23.000000000 +0000
@@ -1,8 +1,8 @@
-dials (3.12.1+dfsg3-4build1) lunar; urgency=medium
+dials (3.12.1+dfsg3-5) unstable; urgency=medium
 
-  * Rebuild against latest icu
+  * Restrict building to amd64 for python3-dials too.
 
- -- Jeremy Bicha <jbicha@ubuntu.com>  Mon, 06 Feb 2023 07:32:34 -0500
+ -- Roland Mas <lolando@debian.org>  Wed, 08 Feb 2023 17:40:23 +0100
 
 dials (3.12.1+dfsg3-4) unstable; urgency=medium
 
diff -Nru dials-3.12.1+dfsg3/debian/control dials-3.12.1+dfsg3/debian/control
--- dials-3.12.1+dfsg3/debian/control	2023-01-18 16:42:14.000000000 +0000
+++ dials-3.12.1+dfsg3/debian/control	2023-02-08 16:39:58.000000000 +0000
@@ -68,7 +68,7 @@
  both within DIALS and by third parties.
 
 Package: python3-dials
-Architecture: any
+Architecture: amd64
 Depends: ${misc:Depends},
          ${python3:Depends},
          ${shlibs:Depends},