diff --git a/src/package.ml b/src/package.ml
index 1b2d1577..c6350f03 100644
--- a/src/package.ml
+++ b/src/package.ml
@@ -4,7 +4,7 @@ module Name = struct
   include Interned.Make(struct
       let initial_size = 16
       let resize_policy = Interned.Conservative
-    end)
+    end)()
 
   let of_string = make
 
diff --git a/src/stdune/interned.ml b/src/stdune/interned.ml
index e3cfc92f..94e086dc 100644
--- a/src/stdune/interned.ml
+++ b/src/stdune/interned.ml
@@ -31,7 +31,7 @@ let new_size ~next ~size = function
 module Make(R : sig
     val resize_policy : resize_policy
     val initial_size  : int
-  end)
+  end)()
 = struct
   type t = int
 
diff --git a/src/stdune/interned.mli b/src/stdune/interned.mli
index 2b71006c..6f069042 100644
--- a/src/stdune/interned.mli
+++ b/src/stdune/interned.mli
@@ -39,4 +39,4 @@ type resize_policy = Conservative | Greedy
 module Make(R : sig
     val initial_size : int
     val resize_policy : resize_policy
-  end) : S
+  end)() : S
diff --git a/src/sub_system_name.ml b/src/sub_system_name.ml
index 14397bbf..a18a607a 100644
--- a/src/sub_system_name.ml
+++ b/src/sub_system_name.ml
@@ -3,4 +3,4 @@ open Stdune
 include Interned.Make(struct
     let initial_size = 16
     let resize_policy = Interned.Conservative
-  end)
+  end)()
diff --git a/src/variant.ml b/src/variant.ml
index 548b4855..ed48c27b 100644
--- a/src/variant.ml
+++ b/src/variant.ml
@@ -3,7 +3,7 @@ open Stdune
 include Interned.Make(struct
     let initial_size = 256
     let resize_policy = Interned.Conservative
-  end)
+  end)()
 
 let ppx_driver = make "ppx_driver"
 let mt         = make "mt"