diff --git a/src/cmd/fix/typecheck.go b/src/cmd/fix/typecheck.go
index c5900d8dcd..eafb626c74 100644
--- a/src/cmd/fix/typecheck.go
+++ b/src/cmd/fix/typecheck.go
@@ -166,7 +166,7 @@ func typecheck(cfg *TypeConfig, f *ast.File) (typeof map[interface{}]string, ass
 			if err != nil {
 				return err
 			}
-			defer os.Remove(dir)
+			defer os.RemoveAll(dir)
 			err = ioutil.WriteFile(filepath.Join(dir, "in.go"), txt, 0600)
 			if err != nil {
 				return err