diff --git a/src/command/defaults/SetWorldSpawnCommand.php b/src/command/defaults/SetWorldSpawnCommand.php
index 1257e388f..96582a349 100644
--- a/src/command/defaults/SetWorldSpawnCommand.php
+++ b/src/command/defaults/SetWorldSpawnCommand.php
@@ -31,6 +31,7 @@ use pocketmine\math\Vector3;
 use pocketmine\permission\DefaultPermissionNames;
 use pocketmine\player\Player;
 use pocketmine\utils\TextFormat;
+use pocketmine\world\World;
 use function count;
 
 class SetWorldSpawnCommand extends VanillaCommand{
@@ -60,8 +61,18 @@ class SetWorldSpawnCommand extends VanillaCommand{
 				return true;
 			}
 		}elseif(count($args) === 3){
-			$world = $sender->getServer()->getWorldManager()->getDefaultWorld();
-			$pos = new Vector3($this->getInteger($sender, $args[0]), $this->getInteger($sender, $args[1]), $this->getInteger($sender, $args[2]));
+			if($sender instanceof Player){
+				$base = $sender->getPosition();
+				$world = $base->getWorld();
+			}else{
+				$base = new Vector3(0.0, 0.0, 0.0);
+				$world = $sender->getServer()->getWorldManager()->getDefaultWorld();
+			}
+			$pos = (new Vector3(
+				$this->getRelativeDouble($base->x, $sender, $args[0]),
+				$this->getRelativeDouble($base->y, $sender, $args[1], World::Y_MIN, World::Y_MAX),
+				$this->getRelativeDouble($base->z, $sender, $args[2]),
+			))->floor();
 		}else{
 			throw new InvalidCommandSyntaxException();
 		}