diff --git a/ietf-immutable-annotation.yang b/ietf-immutable-annotation.yang
index 029dd18..a91381f 100644
--- a/ietf-immutable-annotation.yang
+++ b/ietf-immutable-annotation.yang
@@ -93,9 +93,9 @@ module ietf-immutable-annotation {
        annotations in its response to get-data operation.";
     leaf with-immutability {
       when
-       "derived-from-or-self(../ncds:datastore,'sysds:system') "
-     + "or derived-from-or-self(../ncds:datastore,'ds:intended') "
-     + "or derived-from-or-self(../ncds:datastore,'ds:operational')";
+        "derived-from-or-self(../ncds:datastore,'sysds:system') "
+      + "or derived-from-or-self(../ncds:datastore,'ds:intended') "
+      + "or derived-from-or-self(../ncds:datastore,'ds:operational')";
       type empty;
       description
         "If this parameter is present, the server returns the