diff --git a/preprocessor/DynareBison.yy b/preprocessor/DynareBison.yy
index f46810a7d..194391eba 100644
--- a/preprocessor/DynareBison.yy
+++ b/preprocessor/DynareBison.yy
@@ -3112,7 +3112,7 @@ o_regime : REGIME EQUAL INT_NUMBER { driver.option_num("ms.regime",$3); };
 o_data_obs_nbr : DATA_OBS_NBR EQUAL INT_NUMBER { driver.option_num("ms.forecast_data_obs",$3); };
 o_discretionary_tol: DISCRETIONARY_TOL EQUAL non_negative_number { driver.option_num("discretionary_tol",$3); };
 o_analytic_derivation : ANALYTIC_DERIVATION { driver.option_num("analytic_derivation", "1"); }
-o_analytic_derivation_mode : ANALYTIC_DERIVATION_MODE EQUAL signed_number { driver.option_num("analytic_derivation_MODE", $3); }
+o_analytic_derivation_mode : ANALYTIC_DERIVATION_MODE EQUAL signed_number { driver.option_num("analytic_derivation_mode", $3); }
 o_endogenous_prior : ENDOGENOUS_PRIOR { driver.option_num("endogenous_prior", "1"); }
 o_use_univariate_filters_if_singularity_is_detected : USE_UNIVARIATE_FILTERS_IF_SINGULARITY_IS_DETECTED EQUAL INT_NUMBER { driver.option_num("use_univariate_filters_if_singularity_is_detected", $3); }
 o_mcmc_jumping_covariance : MCMC_JUMPING_COVARIANCE EQUAL HESSIAN