diff --git a/orm/db_postgres.go b/orm/db_postgres.go
index 7dbef95a..be4cd0bc 100644
--- a/orm/db_postgres.go
+++ b/orm/db_postgres.go
@@ -123,14 +123,16 @@ func (d *dbBasePostgres) ReplaceMarks(query *string) {
 }
 
 // make returning sql support for postgresql.
-func (d *dbBasePostgres) HasReturningID(mi *modelInfo, query *string) (has bool) {
-	if mi.fields.pk.auto {
-		if query != nil {
-			*query = fmt.Sprintf(`%s RETURNING "%s"`, *query, mi.fields.pk.column)
-		}
-		has = true
+func (d *dbBasePostgres) HasReturningID(mi *modelInfo, query *string) bool {
+	fi := mi.fields.pk
+	if fi.fieldType&IsPositiveIntegerField == 0 && fi.fieldType&IsIntegerField == 0 {
+		return false
 	}
-	return
+
+	if query != nil {
+		*query = fmt.Sprintf(`%s RETURNING "%s"`, *query, fi.column)
+	}
+	return true
 }
 
 // show table sql for postgresql.
diff --git a/orm/models_test.go b/orm/models_test.go
index b6ae21cf..f42d725e 100644
--- a/orm/models_test.go
+++ b/orm/models_test.go
@@ -392,6 +392,11 @@ type IntegerPk struct {
 	Value string
 }
 
+type UintPk struct {
+	Id   uint32 `orm:"pk"`
+	Name string
+}
+
 var DBARGS = struct {
 	Driver string
 	Source string
diff --git a/orm/orm.go b/orm/orm.go
index 38c89334..6f4b7731 100644
--- a/orm/orm.go
+++ b/orm/orm.go
@@ -140,7 +140,14 @@ func (o *orm) ReadOrCreate(md interface{}, col1 string, cols ...string) (bool, i
 		return (err == nil), id, err
 	}
 
-	return false, ind.FieldByIndex(mi.fields.pk.fieldIndex).Int(), err
+	id, vid := int64(0), ind.FieldByIndex(mi.fields.pk.fieldIndex)
+	if mi.fields.pk.fieldType&IsPositiveIntegerField > 0 {
+		id = int64(vid.Uint())
+	} else {
+		id = vid.Int()
+	}
+
+	return false, id, err
 }
 
 // insert model data to database
diff --git a/orm/orm_test.go b/orm/orm_test.go
index 832c7301..0c827c2a 100644
--- a/orm/orm_test.go
+++ b/orm/orm_test.go
@@ -191,6 +191,7 @@ func TestSyncDb(t *testing.T) {
 	RegisterModel(new(InLine))
 	RegisterModel(new(InLineOneToOne))
 	RegisterModel(new(IntegerPk))
+	RegisterModel(new(UintPk))
 
 	err := RunSyncdb("default", true, Debug)
 	throwFail(t, err)
@@ -213,6 +214,7 @@ func TestRegisterModels(t *testing.T) {
 	RegisterModel(new(InLine))
 	RegisterModel(new(InLineOneToOne))
 	RegisterModel(new(IntegerPk))
+	RegisterModel(new(UintPk))
 
 	BootStrap()
 
@@ -2013,3 +2015,26 @@ func TestIntegerPk(t *testing.T) {
 		throwFail(t, AssertIs(out.Value, intPk.Value))
 	}
 }
+
+func TestUintPk(t *testing.T) {
+	name := "go"
+	u := &UintPk{
+		Id:   8,
+		Name: name,
+	}
+
+	created, pk, err := dORM.ReadOrCreate(u, "Id")
+	throwFail(t, err)
+	throwFail(t, AssertIs(created, true))
+	throwFail(t, AssertIs(u.Name, name))
+
+	nu := &UintPk{Id: 8}
+	created, pk, err = dORM.ReadOrCreate(nu, "Id")
+	throwFail(t, err)
+	throwFail(t, AssertIs(created, false))
+	throwFail(t, AssertIs(nu.Id, u.Id))
+	throwFail(t, AssertIs(pk, u.Id))
+	throwFail(t, AssertIs(nu.Name, name))
+
+	dORM.Delete(u)
+}