diff --git a/_includes/head-content.njk b/_includes/head-content.njk
index 581da451..dc8aa37b 100644
--- a/_includes/head-content.njk
+++ b/_includes/head-content.njk
@@ -13,8 +13,11 @@
 <meta property="og:site_name" content="{{ metadata.title }}" />
 <meta property="og:url" content="{{ metadata.url }}{{ page.url }}" />
 {% if image %}
-<meta property="og:image" content="/img/{{ image.src | toOgFilename }}" />
+<meta property="og:image" content="{{ metadata.url }}/img/{{ image.src | toOgFilename }}" />
 <meta property="og:image:alt" content="{{ image.alt }}" />
+{% else %}
+<meta property="og:image" content="{{ metadata.url }}/favicon.ico" />
+<meta property="og:image:alt" content="a teal bird icon" />
 {% endif %}
 
 <meta name="generator" content="{{ eleventy.generator }}">