diff --git a/src/pocketmine/Player.php b/src/pocketmine/Player.php
index 5a89d4a7d..8ccacf6e9 100644
--- a/src/pocketmine/Player.php
+++ b/src/pocketmine/Player.php
@@ -39,6 +39,7 @@ use pocketmine\entity\Skin;
 use pocketmine\event\entity\EntityDamageByEntityEvent;
 use pocketmine\event\entity\EntityDamageEvent;
 use pocketmine\event\inventory\InventoryCloseEvent;
+use pocketmine\event\inventory\InventoryOpenEvent;
 use pocketmine\event\player\cheat\PlayerIllegalMoveEvent;
 use pocketmine\event\player\PlayerAchievementAwardedEvent;
 use pocketmine\event\player\PlayerAnimationEvent;
@@ -2814,16 +2815,17 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 
 		$this->windowIndex[$networkId] = $inventory;
 		$this->windows[spl_object_id($inventory)] = $networkId;
-		if($inventory->open($this)){
-			if($isPermanent){
-				$this->permanentWindows[spl_object_id($inventory)] = true;
-			}
-			return $networkId;
-		}else{
-			$this->removeWindow($inventory);
 
+		$ev = new InventoryOpenEvent($inventory, $this);
+		$ev->call();
+		if($ev->isCancelled()){
 			return -1;
 		}
+		$inventory->open($this);
+		if($isPermanent){
+			$this->permanentWindows[spl_object_id($inventory)] = true;
+		}
+		return $networkId;
 	}
 
 	/**
diff --git a/src/pocketmine/inventory/BaseInventory.php b/src/pocketmine/inventory/BaseInventory.php
index 204361799..63b19c6a6 100644
--- a/src/pocketmine/inventory/BaseInventory.php
+++ b/src/pocketmine/inventory/BaseInventory.php
@@ -23,7 +23,6 @@ declare(strict_types=1);
 
 namespace pocketmine\inventory;
 
-use pocketmine\event\inventory\InventoryOpenEvent;
 use pocketmine\item\Item;
 use pocketmine\item\ItemFactory;
 use pocketmine\Player;
@@ -354,15 +353,8 @@ abstract class BaseInventory implements Inventory{
 		$this->maxStackSize = $size;
 	}
 
-	public function open(Player $who) : bool{
-		$ev = new InventoryOpenEvent($this, $who);
-		$ev->call();
-		if($ev->isCancelled()){
-			return false;
-		}
+	public function open(Player $who) : void{
 		$this->onOpen($who);
-
-		return true;
 	}
 
 	public function close(Player $who) : void{
diff --git a/src/pocketmine/inventory/Inventory.php b/src/pocketmine/inventory/Inventory.php
index d393a3e25..f23a41815 100644
--- a/src/pocketmine/inventory/Inventory.php
+++ b/src/pocketmine/inventory/Inventory.php
@@ -198,10 +198,8 @@ interface Inventory{
 	 * Tries to open the inventory to a player
 	 *
 	 * @param Player $who
-	 *
-	 * @return bool
 	 */
-	public function open(Player $who) : bool;
+	public function open(Player $who) : void;
 
 	public function close(Player $who) : void;