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The Weyburn Wal-Mart is now a non-union workplace, following a decision Wednesday by the Saskatchewan Labour Relations Board. (Google Street View)

The Saskatchewan Labour Relations Board has approved the decertification of Canada's only unionized Wal-Mart.

The board made the decision Wednesday after employees at the Weyburn store voted to decertify 51-5.

Votes were counted last week following a lengthy dispute between the union and the company that went all the way to the Supreme Court.

The board has now accepted those results.

Despite being certified for five years, the United Food and Commercial Workers was never able to negotiate a collective agreement with the retailing giant, which has resisted unionization at its other stores around North America.

Two other Canadian stores, both in Quebec, had previously had unions.

At one of them, employees later voted to decertify, while the other was closed by the company.