diff --git a/dialects/mysql.go b/dialects/mysql.go
index 5a7751b8..9f545f42 100644
--- a/dialects/mysql.go
+++ b/dialects/mysql.go
@@ -402,9 +402,9 @@ func (db *mysql) AddColumnSQL(tableName string, col *schemas.Column) string {
 // ModifyColumnSQL returns a SQL to modify SQL
 func (db *mysql) ModifyColumnSQL(tableName string, col *schemas.Column) string {
 	s, _ := ColumnString(db.dialect, col, false, true)
- 	if col.IsAutoIncrement {
+	/*  	if col.IsAutoIncrement {
 		s += " " + db.AutoIncrStr()
-	} 
+	}  */
 	if col.Comment != "" {
 		s += fmt.Sprintf(" COMMENT '%s'", col.Comment)
 	}
diff --git a/tests/schema_test.go b/tests/schema_test.go
index f13502b3..9c43d982 100644
--- a/tests/schema_test.go
+++ b/tests/schema_test.go
@@ -754,7 +754,7 @@ func getKeysFromMap(m map[string]*schemas.Index) []string {
 
 
 type SyncTestUser struct {
-	Id         int64       `xorm:"pk autoincr 'id' comment('primary key')"`
+	Id         int64       `xorm:"pk autoincr 'id' comment('primary key 1')"`
 	Name       string    `xorm:"'name' notnull comment('nickname')" json:"name"`
 }