diff --git a/depicts/wikibase.py b/depicts/wikibase.py
index cd29195..28389e5 100644
--- a/depicts/wikibase.py
+++ b/depicts/wikibase.py
@@ -1,6 +1,8 @@
 def first_datavalue(entity, pid):
     if pid in entity['claims']:
-        return entity['claims'][pid][0]['mainsnak']['datavalue']['value']
+        mainsnak = entity['claims'][pid][0]['mainsnak']
+        if 'datavalue' in mainsnak:
+            return mainsnak['datavalue']['value']
 
 def get_entity_label(entity):
     if 'en' in entity['labels']: