diff --git a/homeassistant/components/device_tracker/icloud.py b/homeassistant/components/device_tracker/icloud.py
index d196cc40107e213b57c488b7a40fa1be257159a6..a4adaa547bcc94c5693e939c82da8057b7e0f6bc 100644
--- a/homeassistant/components/device_tracker/icloud.py
+++ b/homeassistant/components/device_tracker/icloud.py
@@ -49,7 +49,7 @@ def setup_scanner(hass, config, see):
                               verify=True)
     except PyiCloudFailedLoginException as error:
         _LOGGER.exception(
-            'Error logging into iCloud Service: {}'.format(error)
+            'Error logging into iCloud Service: %s' % error
         )
         return