An end effector assembly for use with a forceps, the end effector assembly comprising: a pair of jaw members (402, 404), at least one jaw member moveable relative to the other about a pivot from a first, open position to a second, closed position for grasping tissue, at least one of the jaw members including a knife channel defined therein that extends therealong, the pivot including a bore defined therethrough; a knife assembly including a knife blade and an actuation shaft, the knife blade disposed distally relative to the pivot and the actuation shaft configured for slidable translation through the bore defined in the pivot to allow selective advancement of the knife blade through the knife channel; and at least one cam assembly operably coupled to the at least one moveable jaw member and actuatable to move the at least one jaw member from the first to second position for grasping tissue therebetween, wherein: the at least one cam assembly includes an actuator configured to move the at least one movable jaw member from the first to second position upon selective longitudinal translation thereof; an actuator bore is defined through the actuator that is configured to slidably receive the actuation shaft therethrough; and the actuation shaft and at least one of the bore of the pivot and the actuator bore have non-circular cross-sections such that the actuation shaft and the at least one of the bore of the pivot and the actuator bore cooperate to prevent the knife blade from rotating. a pair of jaw members (402, 404), at least one jaw member moveable relative to the other about a pivot from a first, open position to a second, closed position for grasping tissue, at least one of the jaw members including a knife channel defined therein that extends therealong, the pivot including a bore defined therethrough; a knife assembly including a knife blade and an actuation shaft, the knife blade disposed distally relative to the pivot and the actuation shaft configured for slidable translation through the bore defined in the pivot to allow selective advancement of the knife blade through the knife channel; and at least one cam assembly operably coupled to the at least one moveable jaw member and actuatable to move the at least one jaw member from the first to second position for grasping tissue therebetween, wherein: the at least one cam assembly includes an actuator configured to move the at least one movable jaw member from the first to second position upon selective longitudinal translation thereof; an actuator bore is defined through the actuator that is configured to slidably receive the actuation shaft therethrough; and the actuation shaft and at least one of the bore of the pivot and the actuator bore have non-circular cross-sections such that the actuation shaft and the at least one of the bore of the pivot and the actuator bore cooperate to prevent the knife blade from rotating. the at least one cam assembly includes an actuator configured to move the at least one movable jaw member from the first to second position upon selective longitudinal translation thereof; an actuator bore is defined through the actuator that is configured to slidably receive the actuation shaft therethrough; and the actuation shaft and at least one of the bore of the pivot and the actuator bore have non-circular cross-sections such that the actuation shaft and the at least one of the bore of the pivot and the actuator bore cooperate to prevent the knife blade from rotating.