diff --git a/fluent-apt-source/debian/rules b/fluent-apt-source/debian/rules
index 1dfe59bc7..d3b742697 100755
--- a/fluent-apt-source/debian/rules
+++ b/fluent-apt-source/debian/rules
@@ -42,6 +42,7 @@ override_dh_auto_build:
 	  echo "URIs: https://fluentd.cdn.cncf.io/6/$${distribution}/$${code_name}/"; \
 	  echo "Suites: $${code_name}"; \
 	  echo "Components: contrib"; \
+	  echo "Architectures: amd64 arm64"; \
 	  echo "Signed-By: /usr/share/keyrings/fluent-archive-keyring.asc"; \
 	) > fluent.sources
 
diff --git a/fluent-lts-apt-source/debian/rules b/fluent-lts-apt-source/debian/rules
index 3af0ceed3..cd3ee894d 100755
--- a/fluent-lts-apt-source/debian/rules
+++ b/fluent-lts-apt-source/debian/rules
@@ -42,6 +42,7 @@ override_dh_auto_build:
 	  echo "URIs: https://fluentd.cdn.cncf.io/lts/6/$${distribution}/$${code_name}/"; \
 	  echo "Suites: $${code_name}"; \
 	  echo "Components: contrib"; \
+	  echo "Architectures: amd64 arm64"; \
 	  echo "Signed-By: /usr/share/keyrings/fluent-lts-archive-keyring.asc"; \
 	) > fluent-lts.sources