diff --git a/src/pocketmine/Player.php b/src/pocketmine/Player.php
index f0fd0f0b3..527cacc90 100644
--- a/src/pocketmine/Player.php
+++ b/src/pocketmine/Player.php
@@ -1228,7 +1228,7 @@ class Player extends Human implements CommandSender, InventoryHolder, ChunkLoade
 
 	public function setDataProperty($id, $type, $value){
 		if(parent::setDataProperty($id, $type, $value)){
-			$this->sendData([$this], [$id => $this->dataProperties[$id]]);
+			$this->sendData($this, [$id => $this->dataProperties[$id]]);
 			return true;
 		}
 
diff --git a/src/pocketmine/entity/Effect.php b/src/pocketmine/entity/Effect.php
index b5dac33b2..9626f317c 100644
--- a/src/pocketmine/entity/Effect.php
+++ b/src/pocketmine/entity/Effect.php
@@ -238,7 +238,7 @@ class Effect{
 	public function add(Entity $entity, $modify = false){
 		if($entity instanceof Player){
 			$pk = new MobEffectPacket();
-			$pk->eid = $entity->getId();
+			$pk->eid = 0;
 			$pk->effectId = $this->getId();
 			$pk->amplifier = $this->getAmplifier();
 			$pk->particles = $this->isVisible();
@@ -261,7 +261,7 @@ class Effect{
 	public function remove(Entity $entity){
 		if($entity instanceof Player){
 			$pk = new MobEffectPacket();
-			$pk->eid = $entity->getId();
+			$pk->eid = 0;
 			$pk->eventId = MobEffectPacket::EVENT_REMOVE;
 			$pk->effectId = $this->getId();