Stemmed point ID needed

[autographcollector11]

A friend found this a year or so ago. Looks to be a Dickson blade-the stem is missing. What do you think? He thinks it may have been a corner notch but hard to guess.
illinois find ....
it is quite crude w/mineral stains.

 

[autographcollector11]

Need to rotate image 90 degrees clockwise