diff --git a/libretube-theme/templates/base.html b/libretube-theme/templates/base.html
index 3c5aa4b..4588849 100644
--- a/libretube-theme/templates/base.html
+++ b/libretube-theme/templates/base.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <html lang="{% block html_lang %}{{ DEFAULT_LANG }}{% endblock %}">
-    <head prefix="og: http://ogp.me/ns#{% if article %}article: http://ogp.me/ns/video#{% endif%}"{% if article %} itemscope itemtype="https://schema.org/VideoObject"{% endif %}>
+    <head prefix="og: http://ogp.me/ns# {% if article %}article: http://ogp.me/ns/video#{% endif%}"{% if article %} itemscope itemtype="https://schema.org/VideoObject"{% endif %}>
         {% block head %}
             <meta charset="UTF-8">
             <meta http-equiv="X-UA-Compatible" content="IE=edge">
