"He was hospitalized two days back and he is fine now. He shall be discharged in a couple of days," said the source.
The 75-year-old reportedly complained of pain in his gall bladder.
Manoj Kumar is known for making movies based on moral values and patriotism like "Shaheed", "Upkar", "Purab Aur Pashchim", "Yadgar", "Shor", "Roti Kapda aur Makan" and "Kranti".