How to get the list of diff from rest api for a merge commit id

[Parag Wankhade]

To get the diff specific to a commit I am using "http: //example.com/rest/api/1.0/projects/{projectKey}/repos/{repositorySlug}/commits/{commitId}/diff" API call. However, this api doesn't give the differences for a merge commit. I need some suggestions if there is any other alternative to this that will fetch the differences.