diff --git a/DynareBison.yy b/DynareBison.yy
index 808fa6a76ce9537523078dd758322f8588bac177..a7b7b2f2e8625d87b35637c943a1a0c574e1c3e3 100644
--- a/DynareBison.yy
+++ b/DynareBison.yy
@@ -1658,6 +1658,7 @@ estimation_options : o_datafile
                    | o_nodecomposition
                    | o_nodiagnostic
                    | o_bayesian_irf
+                   | o_relative_irf
                    | o_dsge_var
                    | o_dsge_varlag
                    | o_irf