diff --git a/src/common/intl.cpp b/src/common/intl.cpp
index 8527fb5f43..f7d751ede9 100644
--- a/src/common/intl.cpp
+++ b/src/common/intl.cpp
@@ -958,8 +958,10 @@ private:
 class wxMsgCatalog
 {
 public:
+#if !wxUSE_UNICODE
     wxMsgCatalog() { m_conv = NULL; }
     ~wxMsgCatalog();
+#endif
 
     // load the catalog from disk (szDirPrefix corresponds to language)
     bool Load(const wxChar *szDirPrefix, const wxChar *szName,
@@ -978,9 +980,11 @@ private:
     wxMessagesHash  m_messages; // all messages in the catalog
     wxString        m_name;     // name of the domain
 
+#if !wxUSE_UNICODE
     // the conversion corresponding to this catalog charset if we installed it
     // as the global one
     wxCSConv *m_conv;
+#endif
 
     wxPluralFormsCalculatorPtr  m_pluralFormsCalculator;
 };
@@ -1407,6 +1411,7 @@ void wxMsgCatalogFile::FillHash(wxMessagesHash& hash,
 // wxMsgCatalog class
 // ----------------------------------------------------------------------------
 
+#if !wxUSE_UNICODE
 wxMsgCatalog::~wxMsgCatalog()
 {
     if ( m_conv )
@@ -1421,6 +1426,7 @@ wxMsgCatalog::~wxMsgCatalog()
         delete m_conv;
     }
 }
+#endif // !wxUSE_UNICODE
 
 bool wxMsgCatalog::Load(const wxChar *szDirPrefix, const wxChar *szName,
                         const wxChar *msgIdCharset, bool bConvertEncoding)
@@ -1434,7 +1440,7 @@ bool wxMsgCatalog::Load(const wxChar *szDirPrefix, const wxChar *szName,
 
     file.FillHash(m_messages, msgIdCharset, bConvertEncoding);
 
-#if wxUSE_WCHAR_T
+#if !wxUSE_UNICODE && wxUSE_WCHAR_T
     // we should use a conversion compatible with the message catalog encoding
     // in the GUI if we don't convert the strings to the current conversion but
     // as the encoding is global, only change it once, otherwise we could get
@@ -1450,7 +1456,7 @@ bool wxMsgCatalog::Load(const wxChar *szDirPrefix, const wxChar *szName,
         wxConvUI =
         m_conv = new wxCSConv(file.GetCharset());
     }
-#endif // wxUSE_WCHAR_T
+#endif // !wxUSE_UNICODE && wxUSE_WCHAR_T
 
     return true;
 }