diff --git a/nova/conf/xenserver.py b/nova/conf/xenserver.py
index 594916756d0d..3bdb4160868e 100644
--- a/nova/conf/xenserver.py
+++ b/nova/conf/xenserver.py
@@ -330,9 +330,6 @@ xenapi_opts = [
     cfg.StrOpt('target_port',
                default='3260',
                help='The iSCSI Target Port, default is port 3260'),
-    cfg.StrOpt('iqn_prefix',
-               default='iqn.2010-10.org.openstack',
-               help='IQN Prefix'),
     # NOTE(sirp): This is a work-around for a bug in Ubuntu Maverick,
     # when we pull support for it, we should remove this
     cfg.BoolOpt('remap_vbd_dev',
diff --git a/releasenotes/notes/remove-unused-config-opt-iqn_prefix-defb44120dae93e3.yaml b/releasenotes/notes/remove-unused-config-opt-iqn_prefix-defb44120dae93e3.yaml
new file mode 100644
index 000000000000..06ed4420d3ef
--- /dev/null
+++ b/releasenotes/notes/remove-unused-config-opt-iqn_prefix-defb44120dae93e3.yaml
@@ -0,0 +1,5 @@
+---
+other:
+  - The XenServer configuration option 'iqn_prefix' has been removed.
+    It was not used anywhere and has no effect on any code, so there
+    should be no impact.