diff --git a/src/Former/Helpers.php b/src/Former/Helpers.php
index 7e7fa1d4..5407714f 100644
--- a/src/Former/Helpers.php
+++ b/src/Former/Helpers.php
@@ -29,12 +29,16 @@ public static function setApp(Container $app)
 	/**
 	 * Encodes HTML
 	 *
-	 * @param string $value The string to encode
+	 * @param string|null $value The string to encode
 	 *
 	 * @return string
 	 */
 	public static function encode($value)
 	{
+		if ($value === null) {
+			return '';
+		}
+
 		return htmlentities($value, ENT_QUOTES, 'UTF-8', true);
 	}