diff --git a/opentech/apply/funds/blocks.py b/opentech/apply/funds/blocks.py
index bf1c36931c7721fc1069cc22a70ed98aacd56826..52139a54f9eb8e8f35bbf90af7d4e565cc546ef8 100644
--- a/opentech/apply/funds/blocks.py
+++ b/opentech/apply/funds/blocks.py
@@ -74,6 +74,7 @@ class MustIncludeStatic(StaticBlock):
         errors = kwargs.pop('errors')
         if errors:
             # Pretend the error is a readonly input so that we get nice formatting
+            # Issue discussed here: https://github.com/wagtail/wagtail/issues/4122
             error_message = '<div class="error"><input readonly placeholder="{}"></div>'.format(errors[0])
         else:
             error_message = ''