diff --git a/src/pocketmine/block/SignPost.php b/src/pocketmine/block/SignPost.php
index 7d272d506..2c94f101a 100644
--- a/src/pocketmine/block/SignPost.php
+++ b/src/pocketmine/block/SignPost.php
@@ -67,7 +67,7 @@ class SignPost extends Transparent{
 				$this->getLevel()->setBlock($blockReplace, $this, true);
 			}else{
 				$this->meta = $face;
-				$this->getLevel()->setBlock($blockReplace, new WallSign($this->meta), true);
+				$this->getLevel()->setBlock($blockReplace, BlockFactory::get(Block::WALL_SIGN, $this->meta), true);
 			}
 
 			Tile::createTile(Tile::SIGN, $this->getLevel(), TileSign::createNBT($this, $face, $item, $player));