The world’s biggest buyout has hit its second major snag in a week.

A Quebec appeals court has sided with dissident debtholders who claimed that the C$51.7 billion ($52.7 billion) purchase of BCE Inc. is unfair to those holding debentures issued by the Canadian telecom giant’s main unit. The ruling Wednesday would send the matter back to a lower court, which originally rejected the debtholders’ motion, though Montreal-based BCE said it will appeal the matter to the Supreme Court of Canada as quickly as possible.