diff --git a/move_to_lib.hlean b/move_to_lib.hlean
index 81cabe3..1b52a94 100644
--- a/move_to_lib.hlean
+++ b/move_to_lib.hlean
@@ -97,7 +97,7 @@ end eq open eq
 
 namespace group
 
-  definition isomorphism_ap (A : Type) (F : A → Group) {a b : A} (p : a = b) : F a ≃g F b :=
+  definition isomorphism_ap {A : Type} (F : A → Group) {a b : A} (p : a = b) : F a ≃g F b :=
     isomorphism_of_eq (ap F p)
 
 end group