Harlem bros Ma$e and Cam'ron are back to being bros after years of beefing.

But that doesn't mean they wouldn't be ribbing each other on the Internet.

Ma$e noticed something was amiss with Killa Cam's pants when the Dipset spitter got together with Diddy to pitch his sex enhancement supplement Pink Horse Power. 

So he pointed it out.

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A post shared by MA$E (@rsvpmase)

@mr_camron i signed off on u going over there but not to have your zipper down," Ma$e typed.  "I taught you better than that!!!"

Cam had to respond.

Would you go zipper down around The Diddler?