diff --git a/roles/koji_builder/templates/builders/site-defaults.cfg b/roles/koji_builder/templates/builders/site-defaults.cfg
index d68cb83790..e0505a4401 100644
--- a/roles/koji_builder/templates/builders/site-defaults.cfg
+++ b/roles/koji_builder/templates/builders/site-defaults.cfg
@@ -13,6 +13,10 @@ config_opts['dnf_warning'] = False
 # https://bugzilla.redhat.com/show_bug.cgi?id=2123812
 config_opts['nspawn_args'] += ['--capability=cap_mac_admin']
 {% endif %}
+{% if ansible_hostname.startswith(('buildhw-a64')) %}
+# enable core dumps on aarch64 buildhw so we can track down a bug
+config_opts['nspawn_args'] += ['--rlimit=RLIMIT_CORE=infinity']
+{% endif %}
 config_opts['dnf_command'] = '/usr/bin/dnf-3'
 config_opts['system_dnf_command'] = '/usr/bin/dnf-3'
 config_opts['dnf_install_command'] = 'install python3-dnf dnf-plugins-core'