diff --git a/matlab/ols/dyn_ols.m b/matlab/ols/dyn_ols.m
index cae3f9a06..0ffab1510 100644
--- a/matlab/ols/dyn_ols.m
+++ b/matlab/ols/dyn_ols.m
@@ -43,7 +43,7 @@ global M_ oo_ options_
 assert(nargin >= 1 && nargin <= 3, 'dyn_ols: takes between 1 and 3 arguments');
 assert(isdseries(ds), 'dyn_ols: the first argument must be a dseries');
 
-jsonfile = [M_.fname '_original.json'];
+jsonfile = [M_.fname filesep() 'model' filesep() 'json' filesep() 'modfile-original.json']);
 if exist(jsonfile, 'file') ~= 2
     error('Could not find %s! Please use the json=compute option (See the Dynare invocation section in the reference manual).', jsonfile);
 end
diff --git a/matlab/ols/olseqs.m b/matlab/ols/olseqs.m
index c44d3dc60..c91b1368e 100644
--- a/matlab/ols/olseqs.m
+++ b/matlab/ols/olseqs.m
@@ -30,7 +30,7 @@ function olseqs(ds, varargin)
 
 global M_ oo_
 
-jsonfile = [M_.fname '_original.json'];
+jsonfile = [M_.fname filesep() 'model' filesep() 'json' filesep() 'modfile-original.json']);
 if exist(jsonfile, 'file') ~= 2
     error('Could not find %s! Please use the json option (See the Dynare invocation section in the reference manual).', jsonfile);
 end
diff --git a/matlab/ols/pooled_ols.m b/matlab/ols/pooled_ols.m
index 383425028..c10c4d5b8 100644
--- a/matlab/ols/pooled_ols.m
+++ b/matlab/ols/pooled_ols.m
@@ -62,7 +62,7 @@ else
 end
 
 %% Read JSON
-jsonfile = [M_.fname '_original.json'];
+jsonfile = [M_.fname filesep() 'model' filesep() 'json' filesep() 'modfile-original.json']);
 if exist(jsonfile, 'file') ~= 2
     error('Could not find %s! Please use the json=compute option (See the Dynare invocation section in the reference manual).', jsonfile);
 end
diff --git a/matlab/ols/sur.m b/matlab/ols/sur.m
index cb49866d4..88cdf6362 100644
--- a/matlab/ols/sur.m
+++ b/matlab/ols/sur.m
@@ -43,7 +43,7 @@ else
 end
 
 %% Read JSON
-jsonfile = [M_.fname '_original.json'];
+jsonfile = [M_.fname filesep() 'model' filesep() 'json' filesep() 'modfile-original.json'];
 if exist(jsonfile, 'file') ~= 2
     error('Could not find %s! Please use the json=compute option (See the Dynare invocation section in the reference manual).', jsonfile);
 end
diff --git a/matlab/plot_contributions.m b/matlab/plot_contributions.m
index 98a185564..541608901 100644
--- a/matlab/plot_contributions.m
+++ b/matlab/plot_contributions.m
@@ -41,7 +41,7 @@ function plot_contributions(equationname, ds1, ds0)
 
 global M_
 
-jsonfile = [M_.fname '_original.json'];
+jsonfile = [M_.fname filesep() 'model' filesep() 'json' filesep() 'modfile-original.json'];
 if exist(jsonfile, 'file') ~= 2
     error('Could not find %s! Please use the json option (See the Dynare invocation section in the reference manual).', jsonfile);
 end