diff --git a/src/main/java/com/alibaba/druid/sql/ast/statement/SQLAlterTableAddPrimaryKey.java b/src/main/java/com/alibaba/druid/sql/ast/statement/SQLAlterTableAddPrimaryKey.java
index 5e36d0b775..ca77487235 100644
--- a/src/main/java/com/alibaba/druid/sql/ast/statement/SQLAlterTableAddPrimaryKey.java
+++ b/src/main/java/com/alibaba/druid/sql/ast/statement/SQLAlterTableAddPrimaryKey.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.alibaba.druid.sql.ast.statement;
 
 import com.alibaba.druid.sql.ast.SQLObjectImpl;
diff --git a/src/main/java/com/alibaba/druid/sql/ast/statement/SQLAlterTableDropIndex.java b/src/main/java/com/alibaba/druid/sql/ast/statement/SQLAlterTableDropIndex.java
index 1162715f9a..2596dcf9bd 100644
--- a/src/main/java/com/alibaba/druid/sql/ast/statement/SQLAlterTableDropIndex.java
+++ b/src/main/java/com/alibaba/druid/sql/ast/statement/SQLAlterTableDropIndex.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.alibaba.druid.sql.ast.statement;
 
 import com.alibaba.druid.sql.ast.SQLName;
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlAlterTableDropIndex_0.java b/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlAlterTableDropIndex_0.java
index 00f7cff541..58a9f7112b 100644
--- a/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlAlterTableDropIndex_0.java
+++ b/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlAlterTableDropIndex_0.java
@@ -31,7 +31,7 @@ public class MySqlAlterTableDropIndex_0 extends TestCase {
         SQLStatement stmt = parser.parseStatementList().get(0);
         parser.match(Token.EOF);
         String output = SQLUtils.toMySqlString(stmt);
-        Assert.assertEquals("ALTER TABLE `test`.`tb1`," + //
+        Assert.assertEquals("ALTER TABLE `test`.`tb1`" + //
                             "\n\tDROP INDEX `ix`", output);
     }