The National Waterways Museum at Gloucester Docks is to lose its national status.
The museum, one of the docks' main tourist attractions, is to become the Gloucester Waterways Museum in the summer.
Based at Llanthony Warehouse, it had recently been threatened with closure because of financial problems.
After restructuring by the Waterways Trust, exhibits will have a greater focus on local waterways heritage.
'History of Gloucester'
The museum will continue to be run by the Waterways Trust.
Manager Doreen Davies said the museum was going through accreditation in May and would become a local museum in June or July.
She said the National Waterways Museum at Stoke Bruerne in Northamptonshire would also be localised, while the museum at Ellesmere Port in Cheshire would remain the National Waterways Museum.
"We will have information about other canals but it will be more localised," Ms Davies said.
"We will tie in more with the history of Gloucester and how the canals work within the city."
The museum would be able to apply for different types of funding than a national museum, she added.