diff --git a/src/DynareBison.yy b/src/DynareBison.yy
index ed10756b1945d7b65bf73229d885fe355143e9a1..851164cfd8793ef8f9f19d16fe8685a295282e2e 100644
--- a/src/DynareBison.yy
+++ b/src/DynareBison.yy
@@ -2137,6 +2137,7 @@ estimation_options : o_datafile
                    | o_mh_init_scale_factor
                    | o_mode_file
                    | o_mode_compute
+                   | o_additional_optimizer_steps
                    | o_mode_check
                    | o_mode_check_neighbourhood_size
                    | o_mode_check_symmetric_plots