diff --git a/sonar/modules/documents/serializers/schemas/dc.py b/sonar/modules/documents/serializers/schemas/dc.py
index 0d9f150e5..0b0616a5b 100644
--- a/sonar/modules/documents/serializers/schemas/dc.py
+++ b/sonar/modules/documents/serializers/schemas/dc.py
@@ -250,9 +250,11 @@ def get_titles(self, obj):
     def get_types(self, obj):
         """Get types."""
         if obj['metadata'].get('documentType'):
+            type = obj['metadata']['documentType'];
+            if type.find(':') != -1:
+                type = type.split(':')[1]
             return [
-                'http://purl.org/coar/resource_type/{type}'.format(
-                    type=obj['metadata']['documentType'].split(':')[1])
+                'http://purl.org/coar/resource_type/{type}'.format(type=type)
             ]
 
         return []