diff --git a/src/pocketmine/entity/object/FallingBlock.php b/src/pocketmine/entity/object/FallingBlock.php
index 9a1a91841..e440fb6d0 100644
--- a/src/pocketmine/entity/object/FallingBlock.php
+++ b/src/pocketmine/entity/object/FallingBlock.php
@@ -64,8 +64,7 @@ class FallingBlock extends Entity{
 		}
 
 		if($blockId === 0){
-			$this->close();
-			return;
+			throw new \UnexpectedValueException("Invalid " . get_class($this) . " entity: block ID is 0 or missing");
 		}
 
 		$damage = $this->namedtag->getByte("Data", 0);
diff --git a/src/pocketmine/entity/object/ItemEntity.php b/src/pocketmine/entity/object/ItemEntity.php
index 00179186d..2e38a386a 100644
--- a/src/pocketmine/entity/object/ItemEntity.php
+++ b/src/pocketmine/entity/object/ItemEntity.php
@@ -66,8 +66,7 @@ class ItemEntity extends Entity{
 
 		$itemTag = $this->namedtag->getCompoundTag("Item");
 		if($itemTag === null){
-			$this->close();
-			return;
+			throw new \UnexpectedValueException("Invalid " . get_class($this) . " entity: expected \"Item\" NBT tag not found");
 		}
 
 		$this->item = Item::nbtDeserialize($itemTag);