A gooseneck trailer having a coupler attached to its neck. The coupler having a recess at its lower end, wherein the diameter of the recess is slightly larger than a diameter of the hitch ball, thus permitting the coupler to receive the hitch ball. The gooseneck trailer further comprises a guide attached to the lower end of the coupler over an exposed area around the recess. The guide having a round arch portion and a pair of prongs. The round arch having a crown portion and a pair of haunches. The radius of the curvature of the crown of the round arch is proportional to the radius of the hitch ball. The pair of prongs are continuous with the pair of haunches, wherein the crown portion, the two haunches, and the two prongs are integral.