diff --git a/preprocessor/DynareBison.yy b/preprocessor/DynareBison.yy
index d225c1972..a92801207 100644
--- a/preprocessor/DynareBison.yy
+++ b/preprocessor/DynareBison.yy
@@ -2366,6 +2366,9 @@ calib_smoother_options_list : calib_smoother_option COMMA calib_smoother_options
 calib_smoother_option : o_filtered_vars
                       | o_filter_step_ahead
                       | o_datafile
+                      | o_prefilter
+                      | o_loglinear
+                      | o_first_obs
                       ;
 
 extended_path : EXTENDED_PATH ';'