The incident happened in the second ball of the 25th over when Dhoni barged into Mustafizur while trying to steal a quick single. The left-arm pacer had come on the way of the Indian skipper and the powerful collision saw him leave the field to get some treatment.
Nasir Hossain then completed the over, before Mustafizur returned in the 37th over to dismiss Suresh Raina, R Ashwin and Ravindra Jadeja and complete his five wicket haul on debut.
"I think this can happen in any match. It's nothing big. I spoke to him later," said the Indian captain with a smile during the post-match press-conference last night.
Mashrafe also did not want to drag the issue.
"Things like this can happen on the field during a match. We all shake hands at the end of the day and such situations can be discussed with the on-field umpires. It's nothing serious," he said.
India lost the first ODI by 79 runs at the Sher-e-Bangla National Cricket Stadium to allow Bangladesh take a 1-0 lead in the three-match series.