diff --git a/sat/core/constants.py b/sat/core/constants.py
index c4eaaf4a..f62dfbc9 100644
--- a/sat/core/constants.py
+++ b/sat/core/constants.py
@@ -189,7 +189,9 @@ class Const(object):
     TEMPLATE_TPL_DIR = "templates"
     TEMPLATE_THEME_DEFAULT = "default"
     TEMPLATE_STATIC_DIR = "static"
-    KEY_LANG = "lang"  # templates i18n
+    # templates i18n
+    KEY_LANG = "lang"
+    KEY_THEME = "theme"
 
     ## Plugins ##