diff --git a/DynareBison.yy b/DynareBison.yy
index 0cabe6cd..513a2788 100644
--- a/DynareBison.yy
+++ b/DynareBison.yy
@@ -1659,6 +1659,7 @@ estimation_options : o_datafile
                    | o_nodecomposition
                    | o_nodiagnostic
                    | o_bayesian_irf
+                   | o_relative_irf
                    | o_dsge_var
                    | o_dsge_varlag
                    | o_irf