diff --git a/theories/algebra/ufrac_auth.v b/theories/algebra/ufrac_auth.v
index 47bb349fa8d85475fc4ee3a320354afa8fd4e7aa..99aa1c5d21dd5ecd6c39a930ff8d993b567bdb68 100644
--- a/theories/algebra/ufrac_auth.v
+++ b/theories/algebra/ufrac_auth.v
@@ -41,8 +41,8 @@ Definition ufrac_auth_frag {A : cmraT} (q : Qp) (x : A) : ufrac_authR A :=
 
 Typeclasses Opaque ufrac_auth_auth ufrac_auth_frag.
 
-Instance: Params (@ufrac_auth_auth) 2.
-Instance: Params (@ufrac_auth_frag) 2.
+Instance: Params (@ufrac_auth_auth) 2 := {}.
+Instance: Params (@ufrac_auth_frag) 2 := {}.
 
 Notation "●U{ q } a" := (ufrac_auth_auth q a) (at level 10, format "●U{ q }  a").
 Notation "â—¯U{ q } a" := (ufrac_auth_frag q a) (at level 10, format "â—¯U{ q }  a").