diff --git a/matlab/dsgevar_posterior_density.m b/matlab/dsgevar_posterior_density.m
index 8e359f3ce..85eb67532 100644
--- a/matlab/dsgevar_posterior_density.m
+++ b/matlab/dsgevar_posterior_density.m
@@ -33,7 +33,7 @@ function bvar = dsgevar_posterior_density(deep,DynareDataset,DatasetInfo,DynareO
 % You should have received a copy of the GNU General Public License
 % along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
 
-gend = options_.nobs;
+gend = DynareDataset.nobs;
 dsge_prior_weight = M_.params(strmatch('dsge_prior_weight',M_.param_names));
 DSGE_PRIOR_WEIGHT = floor(gend*(1+dsge_prior_weight));