diff --git a/kirby/config/methods.php b/kirby/config/methods.php
index c1b997e..ab63592 100644
--- a/kirby/config/methods.php
+++ b/kirby/config/methods.php
@@ -350,7 +350,7 @@ return function (App $app) {
 		 * @param string $context Location of output (`html`, `attr`, `js`, `css`, `url` or `xml`)
 		 */
 		'escape' => function (Field $field, string $context = 'html') {
-			$field->value = Str::esc($field->value, $context);
+			$field->value = Str::esc($field->value ?? '', $context);
 			return $field;
 		},