diff --git a/base.go b/base.go
index 2bfe6f8..fed4791 100644
--- a/base.go
+++ b/base.go
@@ -5,6 +5,7 @@ import (
 	"reflect"
 	"strings"
 	"time"
+	"database/sql"
 )
 
 type base struct {
@@ -67,6 +68,8 @@ func (d *base) SetModelValue(driverValue, fieldValue reflect.Value) error {
 			} else {
 				panic(fmt.Sprintf("cannot set created value %T", driverValue.Elem().Interface()))
 			}
+		} else if fieldType == reflect.TypeOf(sql.NullInt64{}) {
+			fieldValue.Set(reflect.ValueOf(sql.NullInt64{driverValue.Elem().Int(),true}))
 		}
 	}
 	return nil
diff --git a/mysql.go b/mysql.go
index 64e7514..ae65afc 100644
--- a/mysql.go
+++ b/mysql.go
@@ -1,6 +1,7 @@
 package hood
 
 import (
+	"database/sql"
 	"fmt"
 	"reflect"
 	"time"
@@ -42,7 +43,7 @@ func (d *mysql) SqlType(f interface{}, size int) string {
 		return "boolean"
 	case int, int8, int16, int32, uint, uint8, uint16, uint32:
 		return "int"
-	case int64, uint64:
+	case int64, uint64, sql.NullInt64:
 		return "bigint"
 	case float32, float64:
 		return "double"
diff --git a/postgres.go b/postgres.go
index 5f171c4..7dc6377 100644
--- a/postgres.go
+++ b/postgres.go
@@ -1,6 +1,7 @@
 package hood
 
 import (
+	"database/sql"
 	"fmt"
 	_ "github.com/lib/pq"
 	"strings"
@@ -31,7 +32,7 @@ func (d *postgres) SqlType(f interface{}, size int) string {
 		return "boolean"
 	case int, int8, int16, int32, uint, uint8, uint16, uint32:
 		return "integer"
-	case int64, uint64:
+	case int64, uint64, sql.NullInt64:
 		return "bigint"
 	case float32, float64:
 		return "double precision"