diff --git a/contrib/src/deprecated/resource.cpp b/contrib/src/deprecated/resource.cpp
index a2055edd7c..e27ed992bc 100644
--- a/contrib/src/deprecated/resource.cpp
+++ b/contrib/src/deprecated/resource.cpp
@@ -251,7 +251,7 @@ bool wxResourceTable::ParseResourceFile(const wxString& filename)
 {
     wxExprDatabase db;
 
-    FILE *fd = wxFopen(filename.fn_str(), wxT("r"));
+    FILE *fd = wxFopen(filename, wxT("r"));
     if (!fd)
         return false;
     bool eof = false;
@@ -2831,7 +2831,7 @@ bool wxResourceParseIncludeFile(const wxString& f, wxResourceTable *table)
     if (!table)
         table = wxDefaultResourceTable;
 
-    FILE *fd = wxFopen(f.fn_str(), wxT("r"));
+    FILE *fd = wxFopen(f, wxT("r"));
     if (!fd)
     {
         return false;
diff --git a/contrib/src/deprecated/wxexpr.cpp b/contrib/src/deprecated/wxexpr.cpp
index 3f30116607..457a60aab6 100644
--- a/contrib/src/deprecated/wxexpr.cpp
+++ b/contrib/src/deprecated/wxexpr.cpp
@@ -1072,7 +1072,7 @@ bool wxExprDatabase::Read(const wxString& filename)
 {
   noErrors = 0;
 
-  FILE *f = wxFopen(filename.fn_str(), _T("r"));
+  FILE *f = wxFopen(filename, _T("r"));
   if (f)
   {
     thewxExprDatabase = this;
@@ -1104,7 +1104,7 @@ bool wxExprDatabase::ReadFromString(const wxString& buffer)
 
 bool wxExprDatabase::Write(const wxString& fileName)
 {
-  FILE *stream = wxFopen( fileName.fn_str(), _T("w+"));
+  FILE *stream = wxFopen( fileName, _T("w+"));
 
   if (!stream)
     return false;