diff --git a/yesod-auth/Yesod/Auth.hs b/yesod-auth/Yesod/Auth.hs
index 78b2d734..cbbadf37 100644
--- a/yesod-auth/Yesod/Auth.hs
+++ b/yesod-auth/Yesod/Auth.hs
@@ -393,7 +393,7 @@ class (YesodAuth master, YesodPersist master) => YesodAuthPersist master where
     --
     -- Since 1.2.0
     type AuthEntity master :: *
-    type instance AuthEntity master = KeyEntity (AuthId master)
+    type AuthEntity master = KeyEntity (AuthId master)
 
     getAuthEntity :: AuthId master -> HandlerT master IO (Maybe (AuthEntity master))