Aliases + module.params

I’m in the process of writing an Ansible module.
I’ve currently got an Ansible task that includes this piece of code:

...
allowed:
- ip_protocol: 'tcp'
- port: '22'
...

AnsibleModule looks something like this:

AnsibleModule(
argument_spec=dict(
allowed=dict(type='list', elements='dict', options=dict(
IPProtocol=dict(required=True, type='str', aliases=['ip_protocol']),
ports=dict(type='list', elements='str')
))
)
)

(tldr; ip_protocol is an alias of IPProtocol).

I end up doing some work with module.params later on. I would expect module.params to look like this:

{
allowed: [
{
IPProtocol: 'tcp',
ports: '22'
}
]
}

Instead, it looks like this:

{
allowed: [
{
IPProtocol: 'tcp',
ip_protocol: 'tcp',
ports: '22'
}
]
}

Is there a way to get a version of module.params that doesn’t have each alias listed out in this way?