diff --git a/src/block/Banner.php b/src/block/Banner.php
index 7f6f62b8a..96151917d 100644
--- a/src/block/Banner.php
+++ b/src/block/Banner.php
@@ -66,6 +66,7 @@ class Banner extends Transparent{
 	}
 
 	public function __clone(){
+		parent::__clone();
 		$this->patterns = $this->patterns->map(Utils::cloneCallback());
 	}
 
diff --git a/src/block/Sign.php b/src/block/Sign.php
index d8a709410..19a6ef29e 100644
--- a/src/block/Sign.php
+++ b/src/block/Sign.php
@@ -60,6 +60,7 @@ class Sign extends Transparent{
 	}
 
 	public function __clone(){
+		parent::__clone();
 		$this->text = clone $this->text;
 	}