Verbs of remembering take the objective genitive or maybe the accusative. This is also known as the genitive of memory. The genitive in this sense is used to describe thinking fondly of someone while the accusative r describes remembering something or forgetting something.
Examples:
Domini meminit hospitis -the master is mindful of his guest.
The emperor has memory of what his mother said about being fair- Imperator memoriae matris inquit
The oldest brother has forgotten of his responsibility-anticissimus frater dediscis pietae.