diff --git a/odoo/api.py b/odoo/api.py
index 3f4f72e73f1..121427c2849 100644
--- a/odoo/api.py
+++ b/odoo/api.py
@@ -905,14 +905,14 @@ class Cache(object):
             if field_cache and isinstance(next(iter(field_cache)), tuple):
                 data[field] = {
                     key: {
-                        Starred(id_) if id_ in dirty_ids else id_: val
+                        Starred(id_) if id_ in dirty_ids else id_: val if field.type != 'binary' else '<binary>'
                         for id_, val in key_cache.items()
                     }
                     for key, key_cache in field_cache.items()
                 }
             else:
                 data[field] = {
-                    Starred(id_) if id_ in dirty_ids else id_: val
+                    Starred(id_) if id_ in dirty_ids else id_: val if field.type != 'binary' else '<binary>'
                     for id_, val in field_cache.items()
                 }
         return repr(data)