Business Secretary Vince Cable has pulled out of an Oxford University event over fears that a planned student protest could cause disruption, his spokesman said.
Mr Cable was due to speak at the Oxford University Examinations Schools but has postponed the visit following police advice.
Students are still planning to go ahead with the demonstration over the Government's proposal to cut higher education funding and raise tuition fees, with the university's Cherwell newspaper saying it will be "one of the largest Oxford student protests in recent years".
Mr Cable's spokesman said: "Vince Cable has postponed a visit to the University of Oxford where he was due to speak to students in his capacity as an MP about his life in politics.
"This followed advice from Thames Valley Police about threats of a protest and his concern about the level of disruption this could cause to the people of Oxford plus the possible cost of policing."
A police spokesman said: "Thames Valley Police was putting plans in place for the visit of Vince Cable to the Oxford University Exams School on October 28.
"However, Mr Cable's office has today advised Thames Valley Police that following their own risk assessment, they have made the decision to cancel the event."
The protest "was always intended to be peaceful", the Cherwell added.