diff --git a/lib/intercom-rails/auto_include_filter.rb b/lib/intercom-rails/auto_include_filter.rb
index 29be93c..1f28360 100644
--- a/lib/intercom-rails/auto_include_filter.rb
+++ b/lib/intercom-rails/auto_include_filter.rb
@@ -55,7 +55,11 @@ def response
       end
 
       def html_content_type?
-        response.content_type == 'text/html'
+        if response.respond_to?(:media_type)
+          response.media_type == 'text/html'
+        else
+          response.content_type == 'text/html'
+        end
       end
 
       def response_has_closing_body_tag?