diff --git a/lib/site_setting_extension.rb b/lib/site_setting_extension.rb
index b29a6a7c575..5d78c224df3 100644
--- a/lib/site_setting_extension.rb
+++ b/lib/site_setting_extension.rb
@@ -144,7 +144,7 @@ module SiteSettingExtension
     type = get_data_type(defaults[name])
 
     if type == Types::Bool && val != true && val != false
-      val = (val == "t" || val == "true")
+      val = (val == "t" || val == "true") ? 't' : 'f'
     end
 
     if type == Types::Fixnum && !(Fixnum === val)