diff --git a/dialects/mysql.go b/dialects/mysql.go
index 9f545f42..424807d4 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)
 	}