diff --git a/doc/manual/source/the-model-file.rst b/doc/manual/source/the-model-file.rst
index 8ee14523f..f76023b35 100644
--- a/doc/manual/source/the-model-file.rst
+++ b/doc/manual/source/the-model-file.rst
@@ -10215,6 +10215,15 @@ Dynare can also run the smoother on a calibrated model:
 
         See :opt:`xls_range <xls_range = RANGE>`.
 
+    .. option:: heteroskedastic_filter
+
+        See :opt:`heteroskedastic_filter`.
+
+    .. option:: nobs = INTEGER
+                nobs = [INTEGER1:INTEGER2]
+
+        See :opt:`nobs <nobs = INTEGER>`.
+
 .. _fore:
 
 Forecasting