diff --git a/src/core/suspend_.ml b/src/core/suspend_.ml
index 05f9aa96..44ac324d 100644
--- a/src/core/suspend_.ml
+++ b/src/core/suspend_.ml
@@ -1,8 +1,6 @@
 type suspension = unit Exn_bt.result -> unit
 type task = unit -> unit
 
-[@@@ifge 5.0]
-
 type suspension_handler = {
   handle:
     run:(task -> unit) ->
@@ -12,6 +10,7 @@ type suspension_handler = {
 }
 [@@unboxed]
 
+[@@@ifge 5.0]
 [@@@ocaml.alert "-unstable"]
 
 module A = Atomic_
diff --git a/src/core/suspend_.mli b/src/core/suspend_.mli
index 842d77f1..de90e2d4 100644
--- a/src/core/suspend_.mli
+++ b/src/core/suspend_.mli
@@ -6,8 +6,6 @@
 type suspension = unit Exn_bt.result -> unit
 (** A suspended computation *)
 
-[@@@ifge 5.0]
-
 type task = unit -> unit
 
 type suspension_handler = {
@@ -40,6 +38,7 @@ type suspension_handler = {
     - use [resume] exactly
 *)
 
+[@@@ifge 5.0]
 [@@@ocaml.alert "-unstable"]
 
 type _ Effect.t +=