diff --git a/app/lib/activitypub/activity/create.rb b/app/lib/activitypub/activity/create.rb
index 47ab1b6963a..4fb3e3dc9f0 100644
--- a/app/lib/activitypub/activity/create.rb
+++ b/app/lib/activitypub/activity/create.rb
@@ -429,8 +429,12 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
   end
 
   def guess_quote_url
-    if @object["quoteUrl"] && !@object["quoteUrl"].empty?
+    if @object["quoteUri"] && !@object["quoteUri"].empty?
+      @object["quoteUri"]
+    elsif @object["quoteUrl"] && !@object["quoteUrl"].empty?
       @object["quoteUrl"]
+    elsif @object["quoteURL"] && !@object["quoteURL"].empty?
+      @object["quoteURL"]
     elsif @object["_misskey_quote"] && !@object["_misskey_quote"].empty?
       @object["_misskey_quote"]
     else