diff --git a/hassio/addons/data.py b/hassio/addons/data.py
index 819f35756..3676b086a 100644
--- a/hassio/addons/data.py
+++ b/hassio/addons/data.py
@@ -123,8 +123,8 @@ class AddonsData(Config):
         try:
             builtin_file = Path(__file__).parent.joinpath('built-in.json')
             builtin_data = read_json_file(builtin_file)
-        except (OSError, json.JSONDecodeError):
-            _LOGGER.warning("Can't read built-in.json!")
+        except (OSError, json.JSONDecodeError) as err:
+            _LOGGER.warning("Can't read built-in.json -> %s", err)
             return
 
         # if core addons are available