diff --git a/readme.txt b/readme.txt
index d1ffa54..675bbfe 100644
--- a/readme.txt
+++ b/readme.txt
@@ -92,6 +92,7 @@ Yes! Pagespeed is one of our main focus points, and we strive to make the plugin
 Enhancements:
 
 Bugfixes:
+* Fixes an error when no payment gateways are defined.
 
 Other:
 
diff --git a/src/Integration/WooCommerce.php b/src/Integration/WooCommerce.php
index 3c1279d..13cb730 100644
--- a/src/Integration/WooCommerce.php
+++ b/src/Integration/WooCommerce.php
@@ -248,7 +248,7 @@ public function get_global_data( array $global_data ): array {
 		return $global_data;
 	}
 
-	private function get_payment_method(): string {
+	private function get_payment_method(): ?string {
 
 		$payment_method = WC()->session->get( 'chosen_payment_method' );