diff --git a/wxPython/src/my_typemaps.i b/wxPython/src/my_typemaps.i
index 33f6d98e20..b0975a56c2 100644
--- a/wxPython/src/my_typemaps.i
+++ b/wxPython/src/my_typemaps.i
@@ -283,6 +283,24 @@ MAKE_INT_ARRAY_TYPEMAPS(styles, styles_field)
 }
 
 
+//---------------------------------------------------------------------------
+// wxFileOffset, can be a 32-bit or a 64-bit integer
+
+%typemap(in) wxFileOffset {
+    if (sizeof(wxFileOffset) > sizeof(long))
+        $1 = PyLong_AsLongLong($input);
+    else
+        $1 = PyInt_AsLong($input);
+}
+
+%typemap(out) wxFileOffset {
+    if (sizeof(wxFileOffset) > sizeof(long))
+        $result = PyLong_FromLongLong($1);
+    else
+        $result = PyInt_FromLong($1);
+}
+
+
 //---------------------------------------------------------------------------
 // Typemap for when GDI objects are returned by reference.  This will cause a
 // copy to be made instead of returning a reference to the same instance.  The