diff --git a/roles/bootstrap-os/tasks/bootstrap-centos.yml b/roles/bootstrap-os/tasks/bootstrap-centos.yml
index 007fdce22..19555005a 100644
--- a/roles/bootstrap-os/tasks/bootstrap-centos.yml
+++ b/roles/bootstrap-os/tasks/bootstrap-centos.yml
@@ -79,7 +79,7 @@
     - { option: "name", value: "CentOS-{{ ansible_distribution_major_version }} - Extras" }
     - { option: "enabled", value: "1" }
     - { option: "gpgcheck", value: "0" }
-    - { option: "baseurl", value: "http://mirror.centos.org/centos/{{ ansible_distribution_major_version }}/extras/$basearch/{% if ansible_distribution_major_version|int > 7 %}os/{% endif %}" }
+    - { option: "baseurl", value: "http://mirror.centos.org/{{ 'altarch' if (ansible_distribution_major_version | int) <= 7 and ansible_architecture == 'aarch64' else 'centos' }}/{{ ansible_distribution_major_version }}/extras/$basearch/{% if ansible_distribution_major_version|int > 7 %}os/{% endif %}" }
   when:
     - use_oracle_public_repo|default(true)
     - '''ID="ol"'' in os_release.stdout_lines'