diff --git a/homeassistant/components/history/__init__.py b/homeassistant/components/history/__init__.py
index 1e22e45a89249d..fc533e32dc2705 100644
--- a/homeassistant/components/history/__init__.py
+++ b/homeassistant/components/history/__init__.py
@@ -713,7 +713,7 @@ def attributes(self):
                 self._attributes = json.loads(self._row.attributes)
             except ValueError:
                 # When json.loads fails
-                _LOGGER.exception("Error converting row to state: %s", self)
+                _LOGGER.exception("Error converting row to state: %s", self._row)
                 self._attributes = {}
         return self._attributes