diff --git a/britney.conf b/britney.conf
index d0c24f0..da92134 100644
--- a/britney.conf
+++ b/britney.conf
@@ -24,7 +24,7 @@ STATE_DIR          = data/%(SERIES)/state
 # List of architectures that Britney should consider.
 # - defaults to the value in testing's Release file (if it is present).
 # - Required for the legacy layout.
-ARCHITECTURES     = amd64 arm64 armhf i386 powerpc ppc64el riscv64
+ARCHITECTURES     = amd64 amd64v3 arm64 armhf i386 powerpc ppc64el riscv64
 
 # if you're not in this list, arch: all packages are allowed to break on you
 NOBREAKALL_ARCHES = amd64
@@ -39,7 +39,7 @@ HAS_ARCH_ALL_BUILDDS = no
 OUTOFSYNC_ARCHES  =
 
 # if you're in this list, your uninstallability count may increase
-BREAK_ARCHES      =
+BREAK_ARCHES      = amd64v3
 
 # if you're in this list, you are a new architecture
 NEW_ARCHES        =
diff --git a/britney2/inputs/suiteloader.py b/britney2/inputs/suiteloader.py
index 964f239..5fc9332 100644
--- a/britney2/inputs/suiteloader.py
+++ b/britney2/inputs/suiteloader.py
@@ -382,6 +382,11 @@ class DebMirrorLikeSuiteContentLoader(SuiteContentLoader):
                 provides = []
 
             raw_arch = intern(get_field('Architecture'))
+            # FIXME: Make this configurable.
+            # If a base architecture is used in an architecture variant package file, promote
+            # it to the variant architecture.
+            if arch == "amd64v3" and raw_arch == "amd64":
+                raw_arch = "amd64v3"
             if raw_arch not in {'all', arch}:  # pragma: no cover
                 raise AssertionError("%s has wrong architecture (%s) - should be either %s or all" % (
                     str(pkg_id), raw_arch, arch))