diff --git a/helpers.go b/helpers.go
index 8c0f7574..b80d1e53 100644
--- a/helpers.go
+++ b/helpers.go
@@ -156,6 +156,17 @@ func isZero(k interface{}) bool {
 	return false
 }
 
+func isZeroValue(v reflect.Value) bool {
+	if isZero(v.Interface()) {
+		return true
+	}
+	switch v.Kind() {
+	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
+		return v.IsNil()
+	}
+	return false
+}
+
 func isStructZero(v reflect.Value) bool {
 	if !v.IsValid() {
 		return true
@@ -414,7 +425,7 @@ func genCols(table *core.Table, session *Session, bean interface{}, useCol bool,
 
 		// !evalphobia! set fieldValue as nil when column is nullable and zero-value
 		if _, ok := getFlagForColumn(session.Statement.nullableMap, col); ok {
-			if col.Nullable && isZero(fieldValue.Interface()) {
+			if col.Nullable && isZeroValue(fieldValue) {
 				var nilValue *int
 				fieldValue = reflect.ValueOf(nilValue)
 			}
diff --git a/types_test.go b/types_test.go
index aadf5f69..222c4f80 100644
--- a/types_test.go
+++ b/types_test.go
@@ -134,13 +134,39 @@ func (s *SliceType) ToDB() ([]byte, error) {
 	return json.Marshal(s)
 }
 
+type Nullable struct {
+	Data string
+}
+
+func (s *Nullable) FromDB(data []byte) error {
+	if data == nil {
+		return nil
+	}
+
+	*s = Nullable{
+		Data: string(data),
+	}
+
+	return nil
+}
+
+func (s *Nullable) ToDB() ([]byte, error) {
+	if s == nil {
+		return nil, nil
+	}
+
+	return []byte(s.Data), nil
+}
+
 type ConvStruct struct {
-	Conv  ConvString
-	Conv2 *ConvString
-	Cfg1  ConvConfig
-	Cfg2  *ConvConfig     `xorm:"TEXT"`
-	Cfg3  core.Conversion `xorm:"BLOB"`
-	Slice SliceType
+	Conv      ConvString
+	Conv2     *ConvString
+	Cfg1      ConvConfig
+	Cfg2      *ConvConfig     `xorm:"TEXT"`
+	Cfg3      core.Conversion `xorm:"BLOB"`
+	Slice     SliceType
+	Nullable1 *Nullable `xorm:"null"`
+	Nullable2 *Nullable `xorm:"null"`
 }
 
 func (c *ConvStruct) BeforeSet(name string, cell Cell) {
@@ -163,8 +189,10 @@ func TestConversion(t *testing.T) {
 	c.Cfg2 = &ConvConfig{"xx", 2}
 	c.Cfg3 = &ConvConfig{"zz", 3}
 	c.Slice = []*ConvConfig{{"yy", 4}, {"ff", 5}}
+	c.Nullable1 = &Nullable{Data: "test"}
+	c.Nullable2 = nil
 
-	_, err := testEngine.Insert(c)
+	_, err := testEngine.Nullable("nullable2").Insert(c)
 	assert.NoError(t, err)
 
 	c1 := new(ConvStruct)
@@ -182,6 +210,9 @@ func TestConversion(t *testing.T) {
 	assert.EqualValues(t, 2, len(c1.Slice))
 	assert.EqualValues(t, *c.Slice[0], *c1.Slice[0])
 	assert.EqualValues(t, *c.Slice[1], *c1.Slice[1])
+	assert.NotNil(t, c1.Nullable1)
+	assert.Equal(t, c1.Nullable1.Data, "test")
+	assert.Nil(t, c1.Nullable2)
 }
 
 type MyInt int