diff --git a/bin/common.ml b/bin/common.ml
index cb423ea0ae2..2da558f1dae 100644
--- a/bin/common.ml
+++ b/bin/common.ml
@@ -656,7 +656,6 @@ module Builder = struct
   let forbid_builds t = { t with allow_builds = false; no_print_directory = true }
   let default_root_is_cwd t = t.default_root_is_cwd
   let set_default_root_is_cwd t x = { t with default_root_is_cwd = x }
-  let set_log_file t x = { t with log_file = x }
   let disable_log_file t = { t with log_file = No_log_file }
   let set_promote t v = { t with promote = Some v }
   let default_target t = t.default_target
diff --git a/bin/common.mli b/bin/common.mli
index af57817b6ac..d659ec42aa9 100644
--- a/bin/common.mli
+++ b/bin/common.mli
@@ -36,7 +36,6 @@ module Builder : sig
   val forbid_builds : t -> t
   val default_root_is_cwd : t -> bool
   val set_default_root_is_cwd : t -> bool -> t
-  val set_log_file : t -> Log.File.t -> t
   val disable_log_file : t -> t
   val set_promote : t -> Dune_engine.Clflags.Promote.t -> t
   val default_target : t -> Arg.Dep.t