diff --git a/eddy/core/exporters/owl2.py b/eddy/core/exporters/owl2.py
index f8203c81..2f5d7007 100644
--- a/eddy/core/exporters/owl2.py
+++ b/eddy/core/exporters/owl2.py
@@ -1137,7 +1137,7 @@ def getLiteral(self, node):
         lang = literal.language
         datatype = literal.datatype
         if lang:
-            return self.df.getOWLLiteral(lexForm, lang)
+            return self.df.getOWLLiteral(lexForm, str(lang))
         else:
             if datatype:
                 owlApiDatatype = self.df.getOWLDatatype(self.IRI.create(str(datatype)))