diff --git a/salt/minion/cert/libvirtd/server.yml b/salt/minion/cert/libvirtd/server.yml
index b091d86..261ce56 100644
--- a/salt/minion/cert/libvirtd/server.yml
+++ b/salt/minion/cert/libvirtd/server.yml
@@ -8,7 +8,10 @@
         libvirtd_server:
           host: ${_param:salt_minion_ca_host}
           authority: ${_param:salt_minion_ca_authority}
-          common_name: ${linux:system:name}.${_param:cluster_domain}
+          # NOTE(vsaienko) according to RFC2380 CN is limited to 63 chars
+          # Set CN without domain name to fit this requirement.
+          # FQDN is included into alternative names field.
+          common_name: ${linux:system:name}
           signing_policy: cert_server
           alternative_names: >
             IP:${_param:cluster_local_address},