Is there a way to modify the ObjectTypeIndication field of an m4a file?

I have a lot of m4a files with aac audio, but the ObjectTypeIndication is set to 0x67. I think my Symbian cellphone doesn't like that identifier, and only reads 0x40 as audio files. 0x67 m4a go to the movie player, which is rather anoying. Is there a way to modify without reencoding the files?

Thanks.