Regexp checkstyle to handle asterisk in copyright header

Question

I am trying to use checkstyle to validate copyright header in my java code from a copyright header file.

 <module name="RegexpHeader">
    <property name="headerFile" value="${samedir}/somefile.header"/>
    <property name="ignoreLines" value="10,11"/>
    <property name="fileExtensions" value="java"/>
    <property name="severity" value="error"/>
  </module> 

The copyright header is added to each java file as a multiline comment

/***************** \n 
* Line 1 \n
* Line 2 \n
* Line 3 \n 
*****************/

I am having issues with handling asterisk as a first character of the line. I need checkstyle to read first as is without considering it as a regex

I tried to escape the asterisk with * or \* but it does not work for me. Any clue?