The Pennsylvania Supreme Court said voters should be allowed to cast provisional ballots in person at their polling place if their mail ballots are rejected because of certain defects, in a ruling Wednesday that could give thousands of Pennsylvanians the opportunity to vote even if their mail ballots were disqualified due to errors.

Pennsylvania’s highest court has ruled people whose mail ballots are rejected for not following technical procedures in state law can cast provisional ballots.

The Pennsylvania Supreme Court ruled in a 4-3 decision Wednesday that state law provides voters whose mail ballots are rejected an opportunity to vote by provisional ballot. More than 1.1 million mail ballots have already been returned in the key swing state with two weeks until Election Day,