diff --git a/doc/manual/source/the-model-file.rst b/doc/manual/source/the-model-file.rst
index ca323345f05ec6128df6ca27126bcd5cd183de1b..efe7df7b87eadb28b186609670bf7a6ffe2febc8 100644
--- a/doc/manual/source/the-model-file.rst
+++ b/doc/manual/source/the-model-file.rst
@@ -4807,7 +4807,8 @@ block decomposition of the model (see :opt:`block`).
                 state variables and estimated jointly with the
                 original state variables of the model using a
                 nonlinear filter. The algorithm implemented in Dynare
-                is described in *Liu and West (2001)*.
+                is described in *Liu and West (2001)*, and works with
+                ``k`` order local approximations of the model.
 
            ``12``