Index: src/sdk/globals.cpp
===================================================================
--- src/sdk/globals.cpp    (revision 3758)
+++ src/sdk/globals.cpp    (working copy)
@@ -505,7 +505,7 @@
 }
 
 // Return multibyte (C string) representation of the string
-wxWX2MBbuf cbU2C(const wxString& str)
+const wxWX2MBbuf cbU2C(const wxString& str)
 {
     if(platform::unicode)
         return str.mb_str(wxConvUTF8);
Index: src/plugins/contrib/wxSmith/wxwidgets/wxsitemresdataobject.cpp
===================================================================
--- src/plugins/contrib/wxSmith/wxwidgets/wxsitemresdataobject.cpp    (revision 3758)
+++ src/plugins/contrib/wxSmith/wxwidgets/wxsitemresdataobject.cpp    (working copy)
@@ -44,7 +44,7 @@
 bool wxsItemResDataObject::GetDataHere(const wxDataFormat& format,void *buf) const
 {
     wxString XmlData = GetXmlData();
-    wxWX2MBbuf str = cbU2C(XmlData);
+    const wxWX2MBbuf str = cbU2C(XmlData);
     memcpy(buf,str,strlen(str)+1);
        return true;
 }
@@ -52,7 +52,7 @@
 size_t wxsItemResDataObject::GetDataSize(const wxDataFormat& format) const
 {
     wxString XmlData = GetXmlData();
-    wxWX2MBbuf str = cbU2C(XmlData);
+    const wxWX2MBbuf str = cbU2C(XmlData);
     return strlen(str)+1;
 }
 
Index: src/include/globals.h
===================================================================
--- src/include/globals.h    (revision 3758)
+++ src/include/globals.h    (working copy)
@@ -134,7 +134,7 @@
 /// Return @c str as a proper unicode-compatible string
 extern DLLIMPORT wxString cbC2U(const char* str);
 /// Return multibyte (C string) representation of the string
-extern DLLIMPORT wxWX2MBbuf cbU2C(const wxString& str);
+extern DLLIMPORT const wxWX2MBbuf cbU2C(const wxString& str);
 /// Try converting a C-string from different encodings until a possible match is found.
 /// This tries the following encoding converters (in the same order):
 /// utf8, system, default and iso8859-1 to iso8859-15.