To celebrate Canada’s 150th birthday, Prime Minister Justin Trudeau gave a speech to a cheering crowd in Ottawa Saturday, highlighting the diversity and kinship of all the provinces and territories.

However, he failed to mention one major Canadian province in his speech — Alberta.

READ MORE: Massive crowds view for Canada 150 celebration on Parliament Hill

“We may live in British Columbia, Yukon, the Northwest Terrirtoes, Saskatchewan, Manitoba, Nunavut, Ontario, Quebec, New Brunswick, Prince Edward Island, Nova Scotia or Newfoundland or Laborador…but we embrace that diversity while knowing in our hearts we are all Canadians,” he said during his speech at Rideau Hall.

Within minutes of this, people took to social media to point out the mistake. Some saw it as a harmless mistake while others took it a little more to heart.

Trudeau went on Twitter and apologized to Albertans for the mistake.

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