diff --git a/docs/README.md b/docs/README.md
index babec4b9..b2fcca97 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -1775,7 +1775,7 @@ Puppet data hierarchy.
 ### 10.15 Expand a volume
 
 Volumes defined in the `volumes` map can be expanded at will. To enable online extension of
-a volume, add `autoresize = true` to its specs map. You can then increase the size at will.
+a volume, add `enable_resize = true` to its specs map. You can then increase the size at will.
 The corresponding volume will be expanded by the cloud provider and the filesystem will be
 extended by Puppet.
 
diff --git a/openstack/infrastructure.tf b/openstack/infrastructure.tf
index 8ffe187a..e00342c4 100644
--- a/openstack/infrastructure.tf
+++ b/openstack/infrastructure.tf
@@ -100,7 +100,7 @@ resource "openstack_blockstorage_volume_v3" "volumes" {
   size        = each.value.size
   volume_type = lookup(each.value, "type", null)
   snapshot_id = lookup(each.value, "snapshot", null)
-  enable_online_resize = lookup(each.value, "autoresize", false)
+  enable_online_resize = lookup(each.value, "enable_resize", false)
 }
 
 resource "openstack_compute_volume_attach_v2" "attachments" {