An EastEnders actress who has dwarfism has sued the Post Office because she could not reach the counter in a branch.
Kiruna Stamell claimed disability discrimination after she claimed the incident was "quite humiliating".
The Post Office has settled her claim and thanked Ms Stamell for highlighting the issue.
It said it has now put leads on the machines to allow their reach to be extended.
Ms Stamell, who has appeared in comedy Life's Too Short as well as EastEnders, said the incident was made more embarrassing when staff tried to build steps for her using cardboard boxes.
The actress, who is around one metre tall, told the BBC: "It was really embarrassing because there was a very large queue of people behind me.
"I just wanted to be able to put my pin in like everybody else and post a letter, and to withdraw cash. And so staff were improvising random steps out of cardboard boxes and it was really quite humiliating."
She sued the Post Office on the grounds that it had failed to make reasonable adjustments to the devices to make allowances for her height.
Her solicitor, Chris Fry, told the BBC: "Kiruna raised an issue of significant wider importance at a time when the minister of state for disabled people has been urging service providers to improve their accessibility, and as evidence has emerged from DisabledGo that thousands of public places have barriers in place that make it difficult for disabled people to lead ordinary lives.
"These changes brought by Kiruna's case mean that the Post Office is now much more accessible as Britain's 12 million disabled people are sending and receiving presents this Christmas."
The Post Office said it would listen to the public and take appropriate measures in cases such as this.
