diff --git a/app/views/posts/show.html.erb b/app/views/posts/show.html.erb
index 276adc86b..11291031b 100644
--- a/app/views/posts/show.html.erb
+++ b/app/views/posts/show.html.erb
@@ -115,7 +115,7 @@
   <!-- Twitter properties -->
   <% if @post.twitter_card_supported? %>
     <meta name="twitter:card" content="photo">
-    <meta name="twitter:image:src" content="<%= @post.file_url %>">
+    <meta name="twitter:image:src" content="http://<%= Danbooru.config.hostname %><%= @post.file_url %>">
     <meta name="twitter:image:width" content="<%= @post.image_width %>">
     <meta name="twitter:image:height" content="<%= @post.image_height %>">
   <% end %>