diff --git a/include/wx/unichar.h b/include/wx/unichar.h
index 43f8cc985e..07dda658dd 100644
--- a/include/wx/unichar.h
+++ b/include/wx/unichar.h
@@ -267,6 +267,12 @@ public:
     wxUniCharRef& operator=(const wxUniCharRef& c)
         { if (&c != this) *this = c.UniChar(); return *this; }
 
+#if wxUSE_UNICODE_UTF8
+    wxUniCharRef(const wxUniCharRef& that) : m_str(that.m_str), m_pos(that.m_pos) { }
+#else
+    wxUniCharRef(const wxUniCharRef& that) : m_pos(that.m_pos) { }
+#endif
+
 #define wxUNICHAR_REF_DEFINE_OPERATOR_EQUAL(type) \
     wxUniCharRef& operator=(type c) { return *this = wxUniChar(c); }
     wxDO_FOR_CHAR_INT_TYPES(wxUNICHAR_REF_DEFINE_OPERATOR_EQUAL)