diff --git a/app/models/post.rb b/app/models/post.rb
index 2f6bc6653..d8f26e865 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -196,6 +196,14 @@ class Post < ApplicationRecord
       "http://#{Danbooru.config.hostname}#{preview_file_url}"
     end
 
+    def open_graph_image_url
+      if is_image? && has_large?
+        "http://#{Danbooru.config.hostname}#{large_file_url}"
+      else
+        complete_preview_file_url
+      end
+    end
+
     def file_url_for(user)
       if CurrentUser.mobile_mode?
         large_file_url
diff --git a/app/views/posts/show.html.erb b/app/views/posts/show.html.erb
index 7fa0b6706..97bf19e60 100644
--- a/app/views/posts/show.html.erb
+++ b/app/views/posts/show.html.erb
@@ -174,7 +174,7 @@
   <meta property="og:title" content="<%= @post.presenter.humanized_essential_tag_string %> - <%= Danbooru.config.app_name %>">
 
   <% if @post.visible? %>
-    <meta property="og:image" content="http://<%= Danbooru.config.hostname %><%= @post.large_file_url %>">
+    <meta property="og:image" content="<%= @post.open_graph_image_url %>">
   <% end %>
 
   <% if Danbooru.config.enable_post_search_counts %>
@@ -189,7 +189,7 @@
     <meta name="twitter:description" content="<%= @post.presenter.humanized_tag_string %> - <%= Danbooru.config.app_name %>">
 
     <% if @post.visible? %>
-      <meta name="twitter:image" content="http://<%= Danbooru.config.hostname %><%= @post.large_file_url %>">
+      <meta name="twitter:image" content="<%= @post.open_graph_image_url %>">
     <% end %>
   <% end %>