diff --git a/src/pocketmine/item/Bucket.php b/src/pocketmine/item/Bucket.php
index 0cd99f5a8..af516e8d1 100644
--- a/src/pocketmine/item/Bucket.php
+++ b/src/pocketmine/item/Bucket.php
@@ -50,6 +50,14 @@ class Bucket extends Item implements MaybeConsumable{
 		return 0;
 	}
 
+	public function getFuelResidue() : Item{
+		if($this->meta === Block::LAVA or $this->meta === Block::FLOWING_LAVA){
+			return ItemFactory::get(Item::BUCKET);
+		}
+
+		return parent::getFuelResidue();
+	}
+
 	public function onActivate(Player $player, Block $blockReplace, Block $blockClicked, int $face, Vector3 $clickVector) : bool{
 		$resultBlock = BlockFactory::get($this->meta);
 
diff --git a/src/pocketmine/item/Item.php b/src/pocketmine/item/Item.php
index 5d49dd848..b062d6bb2 100644
--- a/src/pocketmine/item/Item.php
+++ b/src/pocketmine/item/Item.php
@@ -655,6 +655,16 @@ class Item implements ItemIds, \JsonSerializable{
 		return 0;
 	}
 
+	/**
+	 * Returns an item after burning fuel
+	 */
+	public function getFuelResidue() : Item{
+		$item = clone $this;
+		$item->pop();
+
+		return $item;
+	}
+
 	/**
 	 * Returns how many points of damage this item will deal to an entity when used as a weapon.
 	 */
diff --git a/src/pocketmine/tile/Furnace.php b/src/pocketmine/tile/Furnace.php
index 920b93249..22ab6adf6 100644
--- a/src/pocketmine/tile/Furnace.php
+++ b/src/pocketmine/tile/Furnace.php
@@ -152,8 +152,7 @@ class Furnace extends Spawnable implements InventoryHolder, Container, Nameable{
 		}
 
 		if($this->burnTime > 0 and $ev->isBurning()){
-			$fuel->pop();
-			$this->inventory->setFuel($fuel);
+			$this->inventory->setFuel($fuel->getFuelResidue());
 		}
 	}
 
diff --git a/tests/gh-actions/build.sh b/tests/gh-actions/build.sh
index a00afb0e2..3ead0ab53 100755
--- a/tests/gh-actions/build.sh
+++ b/tests/gh-actions/build.sh
@@ -21,7 +21,7 @@ curl -sSL https://github.com/php/pecl-file_formats-yaml/archive/2.2.0.tar.gz | t
 cd ..
 
 CFLAGS="$CFLAGS -march=x86-64"
-CXXFLAGS="CXXFLAGS -march=x86-64"
+CXXFLAGS="$CXXFLAGS -march=x86-64"
 
 ./buildconf --force
 ./configure \