diff --git a/matlab/dynare_sensitivity.m b/matlab/dynare_sensitivity.m
index 72ba7232e..849ce5cde 100644
--- a/matlab/dynare_sensitivity.m
+++ b/matlab/dynare_sensitivity.m
@@ -48,7 +48,7 @@ if isfield(options_gsa,'graph_format'),
 end
 if isfield(options_gsa,'mode_file'),
     options_.mode_file=options_gsa.mode_file;
-elseif isfield(options_gsa,'neighborhood_width') && options_gsa_.neighborhood_width>0,
+elseif isfield(options_gsa,'neighborhood_width') && options_gsa.neighborhood_width>0,
     options_.mode_file='';    
 end
 
@@ -182,7 +182,11 @@ if options_gsa.morris==1,
     if ~options_gsa.identification,
         options_gsa.redform=1;
     end
-    options_gsa.pprior=1;
+    if options_gsa.neighborhood_width,
+        options_gsa.pprior=0;
+    else
+        options_gsa.pprior=1;
+    end
     options_gsa.ppost=0;
     %options_gsa.stab=1;
     options_gsa.glue=0;