diff --git a/compiler/libbsl/bslLib.ml b/compiler/libbsl/bslLib.ml
index b9f75bd1..171af065 100644
--- a/compiler/libbsl/bslLib.ml
+++ b/compiler/libbsl/bslLib.ml
@@ -726,7 +726,7 @@ struct
       let root elt = !(elt.root)
       let elt_name elt = elt.name
       let elts e = e
-      let children = List.map (fun e -> e.name, e)
+      let children m = List.map (fun e -> e.name, e) m
       let is_root e = Path.is_root e.pwd
 
       let parent e =
diff --git a/compiler/passes/surfaceAstDependencies.ml b/compiler/passes/surfaceAstDependencies.ml
index f4354a3f..81253d32 100644
--- a/compiler/passes/surfaceAstDependencies.ml
+++ b/compiler/passes/surfaceAstDependencies.ml
@@ -66,7 +66,6 @@ open SurfaceAst
 
 (* shorthands *)
 module SAH = SurfaceAstHelper
-module C = SurfaceAstCons.ExprIdentCons
 module D = SurfaceAstDecons
 module S = SurfaceAst
 
diff --git a/compiler/passes/surfaceAstPasses.ml b/compiler/passes/surfaceAstPasses.ml
index 10edf5cb..00de59fa 100644
--- a/compiler/passes/surfaceAstPasses.ml
+++ b/compiler/passes/surfaceAstPasses.ml
@@ -25,7 +25,6 @@ open SurfaceAstPassesTypes
 
 (* alias *)
 module C = SurfaceAstCons.ExprIdentCons
-module CS = SurfaceAstCons.StringCons
 
 
 
diff --git a/compiler/qmlslicer/qmlSimpleSlicer.ml b/compiler/qmlslicer/qmlSimpleSlicer.ml
index 2eebd96b..04ce77c8 100644
--- a/compiler/qmlslicer/qmlSimpleSlicer.ml
+++ b/compiler/qmlslicer/qmlSimpleSlicer.ml
@@ -17,7 +17,6 @@
 *)
 module Format = Base.Format
 module List = Base.List
-module String = Base.String
 module Q = QmlAst
 module Package = ObjectFiles.Package
 
diff --git a/ocamllib/libbase/baseObj.mli b/ocamllib/libbase/baseObj.mli
index da2d9736..82d72963 100644
--- a/ocamllib/libbase/baseObj.mli
+++ b/ocamllib/libbase/baseObj.mli
@@ -21,7 +21,7 @@ type t = Obj.t
 external repr : 'a -> t = "%identity"
 external obj : t -> 'a = "%identity"
 external magic : 'a -> 'b = "%identity"
-external is_block : t -> bool = "caml_obj_is_block"
+val [@inline always] is_block : t -> bool
 external is_int : t -> bool = "%obj_is_int"
 external tag : t -> int = "caml_obj_tag"
 external set_tag : t -> int -> unit = "caml_obj_set_tag"
diff --git a/ocamllib/libbase/baseString.ml b/ocamllib/libbase/baseString.ml
index 640ce2fa..6931c608 100644
--- a/ocamllib/libbase/baseString.ml
+++ b/ocamllib/libbase/baseString.ml
@@ -20,7 +20,7 @@
 (* depends *)
 module Char = BaseChar
 
-include Bytes
+include String
 
 let compare_int (a:int) b = Pervasives.compare a b