Lieutenant-General Victor Joseph Dieudonné Deguise (22 December 1855 – 18 March 1925) was a Belgian general responsible for the defence of Antwerp during World War I. Deguise entered the Belgian Army in 1874 as a lieutenant in the engineering corps.

By 1888 he was appointed as professor of fortifications at the Military Academy of the Belgian Army.

The Belgian army retreated to the National redoubt of Belgium on 20 August 1914, from where it conducted two sorties out of Antwerp to force the German army to detach additional troops to the siege and to harass the enemy lines of communication during the First Battle of the Marne.

Deguise managed to withstand determined German attacks until the beginning of October, thus enabling the escape of significant Belgian and British military personnel towards Nieuwpoort.

However the arrival of heavy German siege guns (such as the Big Bertha) made his position untenable, and he was forced to surrender the city on 10 October 1914.