diff --git a/src/block/BaseSign.php b/src/block/BaseSign.php
index b01157343..5a7df4663 100644
--- a/src/block/BaseSign.php
+++ b/src/block/BaseSign.php
@@ -103,27 +103,10 @@ abstract class BaseSign extends Transparent implements WoodMaterial{
 		return SupportType::NONE;
 	}
 
-	/**
-	 * @deprecated
-	 */
 	abstract protected function getSupportingFace() : int;
 
-	/**
-	 * @return int[]
-	 */
-	protected function getSupportingFaceOptions() : array{
-		return [$this->getSupportingFace()];
-	}
-
 	public function onNearbyBlockChange() : void{
-		$foundSupport = false;
-		foreach($this->getSupportingFaceOptions() as $face){
-			if($this->getSide($face)->getTypeId() !== BlockTypeIds::AIR){
-				$foundSupport = true;
-				break;
-			}
-		}
-		if(!$foundSupport){
+		if($this->getSide($this->getSupportingFace())->getTypeId() !== BlockTypeIds::AIR){
 			$this->position->getWorld()->useBreakOn($this->position);
 		}
 	}
diff --git a/src/block/WallHangingSign.php b/src/block/WallHangingSign.php
index c167036b1..2332f8e4f 100644
--- a/src/block/WallHangingSign.php
+++ b/src/block/WallHangingSign.php
@@ -27,6 +27,7 @@ use pocketmine\block\utils\HorizontalFacing;
 use pocketmine\block\utils\HorizontalFacingTrait;
 use pocketmine\item\Item;
 use pocketmine\math\Axis;
+use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Facing;
 use pocketmine\math\Vector3;
 use pocketmine\player\Player;
@@ -39,12 +40,13 @@ final class WallHangingSign extends BaseSign implements HorizontalFacing{
 		return Facing::rotateY($this->facing, clockwise: true);
 	}
 
-	protected function getSupportingFaceOptions() : array{
-		//wall hanging signs can be supported from either end of the post
-		return [
-			Facing::rotateY($this->facing, clockwise: true),
-			Facing::rotateY($this->facing, clockwise: false)
-		];
+	public function onNearbyBlockChange() : void{
+		//NOOP - disable default self-destruct behaviour
+	}
+
+	protected function recalculateCollisionBoxes() : array{
+		//only the cross bar is collidable
+		return [AxisAlignedBB::one()->trim(Facing::DOWN, 7 / 8)->squash(Facing::axis($this->facing), 3 / 4)];
 	}
 
 	public function place(BlockTransaction $tx, Item $item, Block $blockReplace, Block $blockClicked, int $face, Vector3 $clickVector, ?Player $player = null) : bool{