diff --git a/pandora/document/models.py b/pandora/document/models.py
index 8c58cf119..296916781 100644
--- a/pandora/document/models.py
+++ b/pandora/document/models.py
@@ -407,7 +407,7 @@ class Document(models.Model):
         if document_key and 'value' in document_key \
                 and isinstance(document_key['value'], dict) \
                 and document_key['value'].get('type') == 'map' \
-                and self.get(document_key['value']['key']):
+                and self.get_value(document_key['value']['key']):
             value = re.compile(document_key['value']['map']).findall(self.get_value(document_key['value']['key']))
             return value[0] if value else default
         elif key == 'user':