diff --git a/src/pocketmine/Player.php b/src/pocketmine/Player.php
index 748a5d644..027a91417 100644
--- a/src/pocketmine/Player.php
+++ b/src/pocketmine/Player.php
@@ -1743,11 +1743,11 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 	 *
 	 * @param Vector3 $pos
 	 * @param float   $maxDistance
-	 * @param float   $maxDiff default 0.71 (approximately sqrt(2) / 2, half of the diagonal width of a block)
+	 * @param float   $maxDiff defaults to half of the 3D diagonal width of a block
 	 *
 	 * @return bool
 	 */
-	public function canInteract(Vector3 $pos, float $maxDistance, float $maxDiff = 0.71) : bool{
+	public function canInteract(Vector3 $pos, float $maxDistance, float $maxDiff = M_SQRT3 / 2) : bool{
 		$eyePos = $this->getPosition()->add(0, $this->getEyeHeight(), 0);
 		if($eyePos->distanceSquared($pos) > $maxDistance ** 2){
 			return false;