The movie, which has abundant steamy and bold scenes, has been produced by Mahesh and Mukesh Bhatt under their Vishesh Films banner.
Lauding the decision, Mahesh said in a statement: "The censor board has come of age. We welcome this decision. 'Khamoshiyan' is an erotic supernatural film and we did not want to tame the product at all.
"That would not be fair to audiences. It is a bold, adult film and we are very happy with the certification."
Starring Gurmeet Choudhary, Sapna Pabbi and Ali Fazal, the movie will release Jan 30.