diff --git a/src/internal/ppxc__script_real.ml b/src/internal/ppxc__script_real.ml
index 392f2a5..d950fc9 100644
--- a/src/internal/ppxc__script_real.ml
+++ b/src/internal/ppxc__script_real.ml
@@ -168,7 +168,7 @@ module C_content_make (E : Empty) = struct
     if cnt = 0 then None else Some (String.concat "\n\n" l)
 end
 
-module C_content_phase0 = C_content_make ()
+module C_content_phase0 = C_content_make (struct end)
 
 module type Const_common_s = sig
   include module type of C_content_phase0
@@ -300,7 +300,7 @@ module Const_phase0 = struct
     else C_content_phase0.add_extract_source s2 loc exn f
 end
 
-module C_content = C_content_make ()
+module C_content = C_content_make (struct end)
 
 module Const = struct
   include Const_common (C_content)