HMCS Riviere du Loup was a modified Flower-class corvette that served with the Royal Canadian Navy during the Second World War.

[3][4][5] The "corvette" designation was created by the French as a class of small warships; the Royal Navy borrowed the term for a period but discontinued its use in 1877.

[6] During the hurried preparations for war in the late 1930s, Winston Churchill reactivated the corvette class, needing a name for smaller ships used in an escort capacity, in this case based on a whaling ship design.

[9] Riviere du Loup was ordered 2 January 1942 as part of the 1942-43 modified Flower-class building programme.

The platform for the 4-inch main gun was raised to minimize the amount of spray over it and to provide a better field of fire.

It was also connected to the wheelhouse by a wide platform that was now the base for the Hedgehog anti-submarine mortar that this version was armed with.

[10] After arriving at Halifax she needed a month's repairs after developing issues en route.