diff --git a/matlab/PosteriorIRF.m b/matlab/PosteriorIRF.m
index 5877d2efd8df199ef036d0f66fbc9dba9aa26e23..47548110dd3bfa54e186bd652a07cd80f5005087 100644
--- a/matlab/PosteriorIRF.m
+++ b/matlab/PosteriorIRF.m
@@ -79,11 +79,11 @@ else
   MhDirectoryName = CheckPath('prior');
 end
 if strcmpi(type,'posterior')
-  load([ MhDirectoryName '/'  M_.fname '_mh_history.mat'])
+  load([ MhDirectoryName filesep  M_.fname '_mh_history.mat'])
   TotalNumberOfMhDraws = sum(record.MhDraws(:,1));
   NumberOfDraws = TotalNumberOfMhDraws-floor(options_.mh_drop*TotalNumberOfMhDraws);
 elseif strcmpi(type,'gsa')
-  load([ MhDirectoryName '/'  M_.fname '_prior.mat'],'lpmat0','lpmat','istable')
+  load([ MhDirectoryName filesep  M_.fname '_prior.mat'],'lpmat0','lpmat','istable')
   x=[lpmat0(istable,:) lpmat(istable,:)];
   clear lpmat istable
   NumberOfDraws=size(x,1);
@@ -94,10 +94,10 @@ end
 if ~strcmpi(type,'gsa')
   B = min([round(.5*NumberOfDraws),500]); options_.B = B;
 end
-try delete([MhDirectoryName '/' M_.fname '_irf_dsge*.mat'])
+try delete([MhDirectoryName filesep M_.fname '_irf_dsge*.mat'])
 catch disp('No _IRFs (dsge) files to be deleted!')
 end
-try delete([MhDirectoryName '/' M_.fname '_irf_bvardsge*.mat'])
+try delete([MhDirectoryName filesep M_.fname '_irf_bvardsge*.mat'])
 catch disp('No _IRFs (bvar-dsge) files to be deleted!')
 end
 irun = 0;
@@ -239,10 +239,10 @@ if strcmpi(type,'gsa')
   return
 end
 
-IRF_DSGEs = dir([MhDirectoryName '/' M_.fname '_IRF_DSGEs*.mat']);
+IRF_DSGEs = dir([MhDirectoryName filesep M_.fname '_IRF_DSGEs*.mat']);
 NumberOfIRFfiles_dsge = length(IRF_DSGEs);
 
-IRF_BVARDSGEs = dir([MhDirectoryName '/' M_.fname '_IRF_BVARDSGEs*.mat']);
+IRF_BVARDSGEs = dir([MhDirectoryName filesep M_.fname '_IRF_BVARDSGEs*.mat']);
 NumberOfIRFfiles_dsgevar = length(IRF_BVARDSGEs);
 
 
@@ -265,7 +265,7 @@ tit(M_.exo_names_orig_ord,:) = M_.exo_names;
 kdx = 0;
 
 for file = 1:NumberOfIRFfiles_dsge
-  load([MhDirectoryName '/' M_.fname '_IRF_DSGEs' int2str(file) '.mat']);
+  load([MhDirectoryName filesep M_.fname '_IRF_DSGEs' int2str(file) '.mat']);
   for i = 1:M_.exo_nbr
     for j = 1:nvar
         for k = 1:size(STOCK_IRF_DSGE,1)
@@ -304,7 +304,7 @@ if MAX_nirfs_dsgevar
     tit(M_.exo_names_orig_ord,:) = M_.exo_names;
     kdx = 0;
     for file = 1:NumberOfIRFfiles_dsgevar
-        load([MhDirectoryName '/' M_.fname '_IRF_BVARDSGEs' int2str(file) '.mat']);
+        load([MhDirectoryName filesep M_.fname '_IRF_BVARDSGEs' int2str(file) '.mat']);
         for i = 1:M_.exo_nbr
             for j = 1:nvar
                 for k = 1:size(STOCK_IRF_BVARDSGE,1)
@@ -363,7 +363,7 @@ localVars.MaxNumberOfPlotPerFigure=MaxNumberOfPlotPerFigure;
 %%% The files .TeX are genereted in sequential way!
 
 if options_.TeX
-  fidTeX = fopen([DirectoryName '/' M_.fname '_BayesianIRF.TeX'],'w');
+  fidTeX = fopen([DirectoryName filesep M_.fname '_BayesianIRF.TeX'],'w');
   fprintf(fidTeX,'%% TeX eps-loader file generated by PosteriorIRF.m (Dynare).\n');
   fprintf(fidTeX,['%% ' datestr(now,0) '\n']);
   fprintf(fidTeX,' \n');