diff --git a/builtin_test.go b/builtin_test.go
index d2586fe3..b4271e10 100644
--- a/builtin_test.go
+++ b/builtin_test.go
@@ -420,7 +420,7 @@ func TestSubstVar(t *testing.T) {
 	pkg := NewPackage("", "foo", gblConf)
 	a := pkg.NewAutoParam("a")
 	scope := pkg.cb.Scope()
-	scope.Insert(NewSubstVar(token.NoPos, pkg.Types, "bar", a))
+	scope.Insert(NewSubst(token.NoPos, pkg.Types, "bar", a))
 	o := Lookup(scope, "bar")
 	if o != a {
 		t.Fatal("TestSubstVar:", o)
diff --git a/type_var_and_const.go b/type_var_and_const.go
index ca45e6f2..2f19c9a6 100644
--- a/type_var_and_const.go
+++ b/type_var_and_const.go
@@ -782,7 +782,7 @@ func (p *SubstType) String() string {
 	return fmt.Sprintf("substType{real: %v}", p.Real)
 }
 
-func NewSubstVar(pos token.Pos, pkg *types.Package, name string, real types.Object) *types.Var {
+func NewSubst(pos token.Pos, pkg *types.Package, name string, real types.Object) *types.Var {
 	return types.NewVar(pos, pkg, name, &SubstType{Real: real})
 }