diff --git a/stdpp/gmap.v b/stdpp/gmap.v
index 58ffef0a5d3fe7a8dc95a0a598a23be543d9b544..ea12bae1a2a62e5e89bdb624b262d09f155cb3d6 100644
--- a/stdpp/gmap.v
+++ b/stdpp/gmap.v
@@ -826,7 +826,7 @@ End gset.
 Section gset_cprod.
   Context `{Countable A, Countable B}.
 
-  #[global] Instance gset_cprod : CProd (gset A) (gset B) (gset (A * B)) :=
+  Global Instance gset_cprod : CProd (gset A) (gset B) (gset (A * B)) :=
     λ X Y, set_bind (λ e1, set_map (e1,.) Y) X.
 
   Lemma elem_of_gset_cprod (X : gset A) (Y : gset B) x :