diff --git a/hco/fragments/VMInstance.yaml b/hco/fragments/VMInstance.yaml
index 15dad90..b0eb789 100644
--- a/hco/fragments/VMInstance.yaml
+++ b/hco/fragments/VMInstance.yaml
@@ -54,7 +54,7 @@
       handle: { get_resource: wait_handle }
       timeout: { get_param: boot_timeout }
 
-  vm_server:
+  server:
     type: OS::Nova::Server
     properties:
       availability_zone: { get_param: availability_zone }
diff --git a/hco/fragments/VMInstanceCeph.yaml b/hco/fragments/VMInstanceCeph.yaml
index 1ba516d..5304d5e 100644
--- a/hco/fragments/VMInstanceCeph.yaml
+++ b/hco/fragments/VMInstanceCeph.yaml
@@ -143,7 +143,7 @@
       handle: {get_resource: wait_handle}
       timeout: { get_param: boot_timeout }
 
-  vm_server:
+  server:
     type: OS::Nova::Server
     properties:
       availability_zone: { get_param: availability_zone }