Question About Mod-Headers

[Suneet Shah <suneetshah2000@xxxxxxxxx>]

hello,

I am using Mod-Headers to pass some customer headers to one of our applications.
I am passing some customer header using the directive below. However I am noticing that the module converts the header value to be lower case. 
The application that we are passing these to is checking the header name in a case sensitive manner. Is there a way to control the case of these header values as they are passed to the target application?

RequestHeader append Userid "my_header_value"


thanks for your help