diff --git a/ZCTextIndex.py b/ZCTextIndex.py
index 4cc14c4..83e48b5 100644
--- a/ZCTextIndex.py
+++ b/ZCTextIndex.py
@@ -124,7 +124,7 @@ def getLexicon(self):
             lexicon = getattr(aq_parent(aq_inner(self)), self.lexicon_id)
             if not ILexicon.isImplementedBy(lexicon):
                 raise TypeError('Object "%s" is not a ZCTextIndex Lexicon'
-                                % lexicon.getId())
+                                % repr(lexicon))
             self._v_lexicon = lexicon
             return lexicon