diff --git a/projects/plugins/jetpack/_inc/lib/core-api/wpcom-endpoints/class-wpcom-rest-api-v2-endpoint-send-email-preview.php b/projects/plugins/jetpack/_inc/lib/core-api/wpcom-endpoints/class-wpcom-rest-api-v2-endpoint-send-email-preview.php
index 14ea6af4d8724..0dbc332825006 100644
--- a/projects/plugins/jetpack/_inc/lib/core-api/wpcom-endpoints/class-wpcom-rest-api-v2-endpoint-send-email-preview.php
+++ b/projects/plugins/jetpack/_inc/lib/core-api/wpcom-endpoints/class-wpcom-rest-api-v2-endpoint-send-email-preview.php
@@ -74,7 +74,7 @@ public function permissions_check( $request ) {
 			);
 		}
 
-		$post = get_post( $request['id'] );
+		$post = get_post( $request->get_param( 'id' ) );
 
 		if ( is_wp_error( $post ) ) {
 			return $post;