diff --git a/src/pocketmine/block/SnowLayer.php b/src/pocketmine/block/SnowLayer.php
index 4d6a649f7..ec1d20d60 100644
--- a/src/pocketmine/block/SnowLayer.php
+++ b/src/pocketmine/block/SnowLayer.php
@@ -48,7 +48,7 @@ class SnowLayer extends Flowable{
 
 	public function place(Item $item, Block $block, Block $target, $face, $fx, $fy, $fz, Player $player = null){
 		$down = $this->getSide(0);
-		if($down instanceof Solid){
+		if($down->isSolid()){
 			$this->getLevel()->setBlock($block, $this, true);
 
 			return true;