Man pages matching name allegro_haptic_constants in section 3alleg5:

ALLEGRO_HAPTIC_CONSTANTS.3alleg5.en	debian 10 / allegro5-doc
ALLEGRO_HAPTIC_CONSTANTS.3alleg5.en	debian 11 / allegro5-doc
ALLEGRO_HAPTIC_CONSTANTS.3alleg5.en	debian 12 / allegro5-doc