diff --git a/src/block/CaveVines.php b/src/block/CaveVines.php
index 6ff934881..ce8fdd970 100644
--- a/src/block/CaveVines.php
+++ b/src/block/CaveVines.php
@@ -88,7 +88,8 @@ class CaveVines extends Flowable{
 	}
 
 	private function canBeSupportedAt(Block $block) : bool{
-		return $block->getAdjacentSupportType(Facing::UP)->equals(SupportType::FULL()) || $block->hasSameTypeId($this);
+		$supportBlock = $block->getSide(Facing::UP);
+		return $supportBlock->getSupportType(Facing::DOWN)->equals(SupportType::FULL()) || $supportBlock->hasSameTypeId($this);
 	}
 
 	public function onNearbyBlockChange() : void{