diff --git a/convert.go b/convert.go
index c4774d97..1be0852d 100644
--- a/convert.go
+++ b/convert.go
@@ -40,6 +40,12 @@ func asString(src interface{}) string {
 		return v
 	case []byte:
 		return string(v)
+	case *sql.NullString:
+		return v.String
+	case *sql.NullInt32:
+		return fmt.Sprintf("%d", v.Int32)
+	case *sql.NullInt64:
+		return fmt.Sprintf("%d", v.Int64)
 	}
 	rv := reflect.ValueOf(src)
 	switch rv.Kind() {
@@ -401,6 +407,7 @@ func convertAssignV(dpv reflect.Value, src interface{}, originalLocation, conver
 		dv.SetFloat(f64)
 		return nil
 	case reflect.String:
+		fmt.Println("=====", src)
 		dv.SetString(asString(src))
 		return nil
 	}
diff --git a/integrations/session_get_test.go b/integrations/session_get_test.go
index 99db98fc..f60a7f7b 100644
--- a/integrations/session_get_test.go
+++ b/integrations/session_get_test.go
@@ -719,7 +719,7 @@ func TestCustomTypes(t *testing.T) {
 	has, err := testEngine.Table(new(TestCustomizeStruct)).ID(s.Id).Cols("name").Get(&name)
 	assert.NoError(t, err)
 	assert.True(t, has)
-	assert.EqualValues(t, "test", name)
+	assert.EqualValues(t, "test", string(name))
 
 	var age MyInt
 	has, err = testEngine.Table(new(TestCustomizeStruct)).ID(s.Id).Select("age").Get(&age)
diff --git a/scan.go b/scan.go
index b23785d8..ce1fcf98 100644
--- a/scan.go
+++ b/scan.go
@@ -57,6 +57,7 @@ func genScanResultsByBeanNullable(bean interface{}, originalLocation, convertedL
 	tp := reflect.TypeOf(bean).Elem()
 	switch tp.Kind() {
 	case reflect.String:
+		fmt.Println("=====", tp)
 		return &sql.NullString{}, true, nil
 	case reflect.Int64:
 		return &sql.NullInt64{}, true, nil