diff --git a/src/pocketmine/block/UnknownBlock.php b/src/pocketmine/block/UnknownBlock.php
index 91ad2a512..b1621728b 100644
--- a/src/pocketmine/block/UnknownBlock.php
+++ b/src/pocketmine/block/UnknownBlock.php
@@ -19,10 +19,11 @@
  *
 */
 
-
 namespace pocketmine\block;
 
-
 class UnknownBlock extends Flowable{
 
+	public function canBeFlowedInto(){
+		return false;
+	}
 }
\ No newline at end of file