diff --git a/preprocessor/DynareBison.yy b/preprocessor/DynareBison.yy
index 0908d0fcb044e59b49065594c37ec7a54beaf9bd..c6bd203b43833bcf3e2d5302ecd5c85011156518 100644
--- a/preprocessor/DynareBison.yy
+++ b/preprocessor/DynareBison.yy
@@ -1800,6 +1800,8 @@ identification_option : o_ar
                       | o_nograph
                       | o_nodisplay
                       | o_graph_format
+                      | o_diffuse_filter
+                      | o_prior_trunc
                       ;
 
 model_comparison : MODEL_COMPARISON mc_filename_list ';'