diff --git a/django/utils/formats.py b/django/utils/formats.py
index f19449ec1e..bba45e3677 100644
--- a/django/utils/formats.py
+++ b/django/utils/formats.py
@@ -6,7 +6,6 @@ from importlib import import_module
 from django.conf import settings
 from django.utils import dateformat, datetime_safe, numberformat
 from django.utils.functional import lazy
-from django.utils.safestring import mark_safe
 from django.utils.translation import (
     check_for_language, get_language, to_locale,
 )
@@ -195,7 +194,7 @@ def localize(value, use_l10n=None):
     if isinstance(value, str):  # Handle strings first for performance reasons.
         return value
     elif isinstance(value, bool):  # Make sure booleans don't get treated as numbers
-        return mark_safe(str(value))
+        return str(value)
     elif isinstance(value, (decimal.Decimal, float, int)):
         return number_format(value, use_l10n=use_l10n)
     elif isinstance(value, datetime.datetime):