The U’s will visit Home Park on Tuesday, January 14, with a 7:45pm kick-off.
It means United will face a double-header in Devon, following the Emirates FA Cup third round tie at Exeter City on Saturday, January 11.
The U’s said that tickets for the rearranged fixture will remain valid.
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United added: “All supporters are advised to maintain their tickets for this rearranged fixture.
“If a refund is required, supporters can do so by returning their original ticket to the Oxford United ticket office. All refunds are required by Monday, January 13, at 5pm.
“If refunds are processed and any tickets become available for purchase, we will communicate this to supporters at the earliest possible opportunity.”