diff --git a/matlab/@dates/dates.m b/matlab/@dates/dates.m
index 8ba7efd3b..b52eb9c93 100644
--- a/matlab/@dates/dates.m
+++ b/matlab/@dates/dates.m
@@ -60,10 +60,14 @@ function dd = dates(varargin) % --*-- Unitary tests --*--
 % GNU General Public License for more details.
 %
 % You should have received a copy of the GNU General Public License
- % along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
+% along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
 
-dd = struct('ndat', 0, 'freq', NaN(0), 'time', NaN(0,2));
-dd = class(dd,'dates');
+if exist('empty-dates-object.mat','file')
+    load('empty-dates-object');
+else
+    dd = struct('ndat', 0, 'freq', NaN(0), 'time', NaN(0,2));
+    dd = class(dd,'dates');
+end
 
 switch nargin
   case 0
diff --git a/matlab/@dseries/dseries.m b/matlab/@dseries/dseries.m
index 2c1ef6485..55ed8c3b7 100644
--- a/matlab/@dseries/dseries.m
+++ b/matlab/@dseries/dseries.m
@@ -76,18 +76,19 @@ function ts = dseries(varargin) % --*-- Unitary tests --*--
 % You should have received a copy of the GNU General Public License
 % along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
 
-ts = struct;
-
-ts.data  = [];
-ts.nobs  = 0;
-ts.vobs  = 0;
-ts.name  = {};
-ts.tex   = {};
-ts.freq  = [];
-ts.init  = dates();
-ts.dates = dates();
-
-ts = class(ts,'dseries');
+if exist('empty-dseries-object.mat','file')
+    load('empty-dseries-object');
+else
+    ts = struct;
+    ts.data  = [];
+    ts.nobs  = 0;
+    ts.vobs  = 0;
+    ts.name  = {};
+    ts.tex   = {};
+    ts.freq  = [];
+    ts.init  = dates();
+    ts.dates = dates();
+end
 
 switch nargin
   case 0
diff --git a/matlab/dynare_config.m b/matlab/dynare_config.m
index cbdf251b7..a92b33248 100644
--- a/matlab/dynare_config.m
+++ b/matlab/dynare_config.m
@@ -250,4 +250,18 @@ if verbose
     skipline()
 end
 
+% Delete empty dates and dseries saved on disk.
+if exist('empty-dates-object.mat','file')
+    delete([dynareroot 'empty-dates-object.mat']);
+end
+if exist('empty-dseries-object.mat','file')
+    delete([dynareroot 'empty-dseries-object.mat']);
+end
+
+% Save empty dates and dseries objects on disk.
+dd = dates();
+ts = dseries();
+save([dynareroot 'empty-dates-object.mat'],'dd');
+save([dynareroot 'empty-dseries-object.mat'],'ts');
+
 cd(origin);