diff --git a/django/utils/translation/__init__.py b/django/utils/translation/__init__.py
index 0ee630728a..2600b85727 100644
--- a/django/utils/translation/__init__.py
+++ b/django/utils/translation/__init__.py
@@ -10,7 +10,7 @@ __all__ = [
     'activate', 'deactivate', 'override', 'deactivate_all',
     'get_language', 'get_language_from_request',
     'get_language_info', 'get_language_bidi',
-    'check_for_language', 'to_locale', 'templatize', 'string_concat',
+    'check_for_language', 'to_locale', 'templatize',
     'gettext', 'gettext_lazy', 'gettext_noop',
     'ugettext', 'ugettext_lazy', 'ugettext_noop',
     'ngettext', 'ngettext_lazy',