diff --git a/x/typesutil/check.go b/x/typesutil/check.go
index dad82567d..03a3a5ef0 100644
--- a/x/typesutil/check.go
+++ b/x/typesutil/check.go
@@ -147,7 +147,7 @@ func (p *Checker) Files(goFiles []*goast.File, gopFiles []*ast.File) (err error)
 		C2goBase:       opts.C2goBase,
 		LookupPub:      c2go.LookupPub(mod),
 		LookupClass:    mod.LookupClass,
-		Importer:       newImporter(conf.Importer, mod, nil, fset),
+		Importer:       conf.Importer,
 		Recorder:       gopRecorder{p.gopInfo},
 		NoFileLine:     true,
 		NoAutoGenMain:  true,
diff --git a/x/typesutil/imp.go b/x/typesutil/imp.go
deleted file mode 100644
index fa51c2472..000000000
--- a/x/typesutil/imp.go
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * Copyright (c) 2023 The GoPlus Authors (goplus.org). All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package typesutil
-
-import (
-	"go/types"
-	"syscall"
-
-	"github.com/goplus/gop"
-	"github.com/goplus/gop/token"
-	"github.com/goplus/gop/x/gopenv"
-	"github.com/goplus/mod/env"
-	"github.com/goplus/mod/gopmod"
-)
-
-// -----------------------------------------------------------------------------
-
-type nilImporter struct{}
-
-func (p nilImporter) Import(path string) (ret *types.Package, err error) {
-	return nil, syscall.ENOENT
-}
-
-// -----------------------------------------------------------------------------
-
-type importer struct {
-	imp types.Importer
-	alt *gop.Importer
-
-	mod  *gopmod.Module
-	gop  *env.Gop
-	fset *token.FileSet
-}
-
-func newImporter(imp types.Importer, mod *gopmod.Module, gop *env.Gop, fset *token.FileSet) types.Importer {
-	if imp == nil {
-		imp = nilImporter{}
-	}
-	if gop == nil {
-		gop = gopenv.Get()
-	}
-	return &importer{imp, nil, mod, gop, fset}
-}
-
-func (p *importer) Import(path string) (ret *types.Package, err error) {
-	ret, err = p.imp.Import(path)
-	if err == nil {
-		return
-	}
-	if p.alt == nil {
-		p.alt = gop.NewImporter(p.mod, p.gop, p.fset)
-	}
-	return p.alt.Import(path)
-}
-
-// -----------------------------------------------------------------------------
diff --git a/x/typesutil/imp_test.go b/x/typesutil/imp_test.go
deleted file mode 100644
index 9751a4ed6..000000000
--- a/x/typesutil/imp_test.go
+++ /dev/null
@@ -1,20 +0,0 @@
-package typesutil
-
-import (
-	"go/token"
-	"testing"
-)
-
-func TestNilImport(t *testing.T) {
-	_, err := (&nilImporter{}).Import("fmt")
-	if err == nil {
-		t.Fatal("no error")
-	}
-	imp := newImporter(nil, nil, nil, token.NewFileSet())
-	if imp.(*importer).imp == nil {
-		t.Fatal("nilImporter")
-	}
-	if imp.(*importer).gop == nil {
-		t.Fatal("gopenv.Get")
-	}
-}