diff --git a/utils/HelpGen/src/ifcontext.cpp b/utils/HelpGen/src/ifcontext.cpp
index 3a52dc0416..d1a36e54c8 100644
--- a/utils/HelpGen/src/ifcontext.cpp
+++ b/utils/HelpGen/src/ifcontext.cpp
@@ -244,7 +244,7 @@ void spInterFileContext::ParseContents( SourceParserPlugin* pPlugin )
 
     for( size_t i = 0; i != m_Files.size(); ++i )
     {
-        wxChar* s = (char*)(m_Contents[i].c_str());
+        wxWritableCharBuffer s(m_Contents[i].char_str());
 
         spFile* pFCtx = mParser.Parse( s, s + m_Contents[i].length() );