After the fall of his government, Pierlot returned to his position as senator of the "arrondissements" of Arlon, Marche-en-Famenne, Bastogne, Neufchâteau and Virton until the elections of February 1946. In September 1945, Pierlot was appointed to the honorary role of Minister of State by Charles and, shortly after the 1946 election, was awarded the title of Count. Because he was considered an anti-Leopoldist during the crisis surrounding the Royal Question, he was ostracised by the pro-Leopoldist successor to the Catholic Party, the Christian Social Party ("Parti social-chrétien" or PSC-CVP).