diff --git a/django/contrib/admin/templatetags/adminmedia.py b/django/contrib/admin/templatetags/adminmedia.py
index 77863435d4..5429810eb9 100644
--- a/django/contrib/admin/templatetags/adminmedia.py
+++ b/django/contrib/admin/templatetags/adminmedia.py
@@ -1,4 +1,5 @@
 from django.template import Library
+from django.utils.encoding import iri_to_uri
 
 register = Library()
 
@@ -10,5 +11,5 @@ def admin_media_prefix():
         from django.conf import settings
     except ImportError:
         return ''
-    return settings.ADMIN_MEDIA_PREFIX
+    return iri_to_uri(settings.ADMIN_MEDIA_PREFIX)
 admin_media_prefix = register.simple_tag(admin_media_prefix)