diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index d0e70b6b0df..9504f22a04a 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -150,11 +150,15 @@ module ApplicationHelper
     end
 
     # Use the correct scheme for open graph image
-    if opts[:image].present? && opts[:image].start_with?("//")
-      uri = URI(Discourse.base_url)
-      opts[:image] = "#{uri.scheme}:#{opts[:image]}"
-    elsif opts[:image].present? && opts[:image].start_with?("/uploads/")
-      opts[:image] = "#{Discourse.base_url}#{opts[:image]}"
+    if opts[:image].present?
+      if opts[:image].start_with?("//")
+        uri = URI(Discourse.base_url)
+        opts[:image] = "#{uri.scheme}:#{opts[:image]}"
+      elsif opts[:image].start_with?("/uploads/")
+        opts[:image] = "#{Discourse.base_url}#{opts[:image]}"
+      elsif GlobalSetting.relative_url_root && opts[:image].start_with?(GlobalSetting.relative_url_root)
+        opts[:image] = "#{Discourse.base_url_no_prefix}#{opts[:image]}"
+      end
     end
 
     # Add opengraph & twitter tags