diff --git a/src/QROptionsTrait.php b/src/QROptionsTrait.php
index ee6d08af2..4c167fab7 100644
--- a/src/QROptionsTrait.php
+++ b/src/QROptionsTrait.php
@@ -388,6 +388,13 @@ trait QROptionsTrait{
 
 	}
 
+	/**
+	 * sets/clamps the quiet zone size
+	 */
+	protected function set_quietzoneSize(int $quietzoneSize):void{
+		$this->quietzoneSize = max(0, min($quietzoneSize, 75));
+	}
+
 	/**
 	 * sets the transparency background color
 	 *