diff --git a/articles/models.py b/articles/models.py
index e044ff6..618c3b2 100644
--- a/articles/models.py
+++ b/articles/models.py
@@ -36,6 +36,7 @@ class Article(models.Model):
     introduction = models.TextField(blank=True)
     body = MarkdownxField()
     summary = MarkdownxField(blank=True)
+    # FIXME: tags with spaces do not match any articles when clicked on.
     tags = TagField(force_lowercase=True,
                     get_absolute_url=lambda tag: reverse_lazy('articles:list_tag', kwargs={'tag': tag.slug}))
     created = models.DateTimeField(auto_now_add=True)