diff --git a/pybossa/api/task_run.py b/pybossa/api/task_run.py
index 1971d5954e..961cc65c6f 100644
--- a/pybossa/api/task_run.py
+++ b/pybossa/api/task_run.py
@@ -142,8 +142,9 @@ def _file_delete(self, request, obj):
         """Delete file object."""
         cls_name = self.__class__.__name__.lower()
         if cls_name in self.allowed_classes_upload:
-            keys = obj.info.keys()
-            if 'file_name' in keys and 'container' in keys:
-                ensure_authorized_to('delete', obj)
-                uploader.delete_file(obj.info['file_name'],
-                                     obj.info['container'])
+            if type(obj.info) == dict:
+                keys = obj.info.keys()
+                if 'file_name' in keys and 'container' in keys:
+                    ensure_authorized_to('delete', obj)
+                    uploader.delete_file(obj.info['file_name'],
+                                         obj.info['container'])