diff --git a/src/pocketmine/network/mcpe/InventoryManager.php b/src/pocketmine/network/mcpe/InventoryManager.php
index 097e55ee6..da285bb87 100644
--- a/src/pocketmine/network/mcpe/InventoryManager.php
+++ b/src/pocketmine/network/mcpe/InventoryManager.php
@@ -132,7 +132,7 @@ class InventoryManager{
 	}
 
 	public function syncAll() : void{
-		foreach($this->player->getAllWindows() as $inventory){
+		foreach($this->windowMap as $inventory){
 			$this->syncContents($inventory);
 		}
 	}
diff --git a/src/pocketmine/player/Player.php b/src/pocketmine/player/Player.php
index 1941643c9..b9dd0d655 100644
--- a/src/pocketmine/player/Player.php
+++ b/src/pocketmine/player/Player.php
@@ -2677,17 +2677,6 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		$this->permanentWindows = [];
 	}
 
-	/**
-	 * @return Inventory[]
-	 */
-	public function getAllWindows() : array{
-		$windows = $this->permanentWindows;
-		if($this->currentWindow !== null){
-			$windows[] = $this->currentWindow;
-		}
-		return $windows;
-	}
-
 	public function setMetadata(string $metadataKey, MetadataValue $newMetadataValue) : void{
 		$this->server->getPlayerMetadata()->setMetadata($this, $metadataKey, $newMetadataValue);
 	}