During his time on the show he referred to Leo Varadkar, the Irish Taoiseach or Prime Minister, as the “President of Ireland”.
Viewers then pointed this out on Twitter, with one writing: “Mr Dan Walker, Leo Varadkar is the Irish Taoiseach Prime Minister not President.”
He went on to reply to the complaint: “Apologies. Entirely my fault for being an idiot. Hope you have a nice Wednesday.”
BBC Breakfast airs weekdays on BBC One at 6am.