diff --git a/src/pocketmine/network/mcpe/protocol/CraftingDataPacket.php b/src/pocketmine/network/mcpe/protocol/CraftingDataPacket.php
index 06ae1feab..94dc2e12b 100644
--- a/src/pocketmine/network/mcpe/protocol/CraftingDataPacket.php
+++ b/src/pocketmine/network/mcpe/protocol/CraftingDataPacket.php
@@ -118,7 +118,7 @@ class CraftingDataPacket extends DataPacket{
 		$this->getBool(); //cleanRecipes
 	}
 
-	private static function writeEntry($entry, NetworkBinaryStream $stream){
+	private static function writeEntry($entry, NetworkBinaryStream $stream) : int{
 		if($entry instanceof ShapelessRecipe){
 			return self::writeShapelessRecipe($entry, $stream);
 		}elseif($entry instanceof ShapedRecipe){