diff --git a/wagtail/wagtailadmin/templates/wagtailadmin/block_forms/stream.html b/wagtail/wagtailadmin/templates/wagtailadmin/block_forms/stream.html
index d2d5d6c3b2..d91734425b 100644
--- a/wagtail/wagtailadmin/templates/wagtailadmin/block_forms/stream.html
+++ b/wagtail/wagtailadmin/templates/wagtailadmin/block_forms/stream.html
@@ -1,4 +1,4 @@
-{% extends "wagtailadmin/block_forms/sequence.html" %}]
+{% extends "wagtailadmin/block_forms/sequence.html" %}
 
 {% block sequence_type_class %}stream{% endblock %}