diff --git a/activitypub.php b/activitypub.php
index 817f553..71e7261 100644
--- a/activitypub.php
+++ b/activitypub.php
@@ -25,7 +25,7 @@ function init() {
 	\defined( 'ACTIVITYPUB_HASHTAGS_REGEXP' ) || \define( 'ACTIVITYPUB_HASHTAGS_REGEXP', '(?:(?<=\s)|(?<=<p>)|(?<=<br>)|^)#([A-Za-z0-9_]+)(?:(?=\s|[[:punct:]]|$))' );
 	\defined( 'ACTIVITYPUB_USERNAME_REGEXP' ) || \define( 'ACTIVITYPUB_USERNAME_REGEXP', '(?:([A-Za-z0-9_-]+)@((?:[A-Za-z0-9_-]+\.)+[A-Za-z]+))' );
 	\defined( 'ACTIVITYPUB_CUSTOM_POST_CONTENT' ) || \define( 'ACTIVITYPUB_CUSTOM_POST_CONTENT', "<strong>[ap_title]</strong>\n\n[ap_content]\n\n[ap_hashtags]\n\n[ap_shortlink]" );
-	defined( 'ACTIVITYPUB_REST_NAMESPACE' ) || define( 'ACTIVITYPUB_REST_NAMESPACE', 'activitypub/1.0' );
+	\defined( 'ACTIVITYPUB_REST_NAMESPACE' ) || \define( 'ACTIVITYPUB_REST_NAMESPACE', 'activitypub/1.0' );
 
 	\define( 'ACTIVITYPUB_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
 	\define( 'ACTIVITYPUB_PLUGIN_BASENAME', plugin_basename( __FILE__ ) );
diff --git a/includes/class-activitypub.php b/includes/class-activitypub.php
index 37bedf4..c5d0e71 100644
--- a/includes/class-activitypub.php
+++ b/includes/class-activitypub.php
@@ -225,7 +225,7 @@ class Activitypub {
 		if ( ! \class_exists( 'Webfinger' ) ) {
 			\add_rewrite_rule(
 				'^.well-known/webfinger',
-				'index.php?rest_route=/activitypub/1.0/webfinger',
+				'index.php?rest_route=/' . ACTIVITYPUB_REST_NAMESPACE . '/webfinger',
 				'top'
 			);
 		}
@@ -233,12 +233,12 @@ class Activitypub {
 		if ( ! \class_exists( 'Nodeinfo' ) && true === (bool) \get_option( 'blog_public', 1 ) ) {
 			\add_rewrite_rule(
 				'^.well-known/nodeinfo',
-				'index.php?rest_route=/activitypub/1.0/nodeinfo/discovery',
+				'index.php?rest_route=/' . ACTIVITYPUB_REST_NAMESPACE . '/nodeinfo/discovery',
 				'top'
 			);
 			\add_rewrite_rule(
 				'^.well-known/x-nodeinfo2',
-				'index.php?rest_route=/activitypub/1.0/nodeinfo2',
+				'index.php?rest_route=/' . ACTIVITYPUB_REST_NAMESPACE . '/nodeinfo2',
 				'top'
 			);
 		}