diff --git a/src/material/block/GenericBlock.php b/src/material/block/GenericBlock.php
index 6b85406b48..fa9099968f 100644
--- a/src/material/block/GenericBlock.php
+++ b/src/material/block/GenericBlock.php
@@ -44,7 +44,8 @@ class GenericBlock extends Block{
 	
 	public function onUpdate($type){
 		if($this->hasPhysics === true){
-			if($this->getSide(0)->getID() === AIR){
+			$down = $this->getSide(0);
+			if($down->getID() === AIR or ($down instanceof LiquidBlock)){
 				$data = array(
 					"x" => $this->x + 0.5,
 					"y" => $this->y + 0.5,