diff --git a/src/flake8/options/config.py b/src/flake8/options/config.py
index a072cb6..5eec367 100644
--- a/src/flake8/options/config.py
+++ b/src/flake8/options/config.py
@@ -215,7 +215,7 @@ class MergedConfigParser(object):
                     method = config_parser.getboolean
             except ValueError:
                 raise ValueError('Unable to parse value ("%s") of option "%s',
-                        option, option_name)
+                                 option, option_name)
 
             value = method(self.program_name, option_name)
             LOG.debug('Option "%s" returned value: %r', option_name, value)