diff --git a/reorder_defs.ml b/reorder_defs.ml
index ec1290a6c981d458ea0a435e952971049b1b493a..857c4433888526a7c13999efabac733e58ee2c25 100644
--- a/reorder_defs.ml
+++ b/reorder_defs.ml
@@ -328,8 +328,9 @@ end
    environment afterwards).
 *)
 
+open Cil
+
 class compute_deps =
-  let open Cil in
   let is_global s = Extlib.string_prefix ~strict:true "_Z" s in
   object(self)
     inherit Cabsvisit.nopCabsVisitor