diff --git a/activitypub.php b/activitypub.php
index 7d7a13693..b4d8fea2b 100644
--- a/activitypub.php
+++ b/activitypub.php
@@ -21,6 +21,12 @@
 
 \define( 'ACTIVITYPUB_PLUGIN_VERSION', '4.2.1' );
 
+// Plugin related constants.
+\define( 'ACTIVITYPUB_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
+\define( 'ACTIVITYPUB_PLUGIN_BASENAME', plugin_basename( __FILE__ ) );
+\define( 'ACTIVITYPUB_PLUGIN_FILE', ACTIVITYPUB_PLUGIN_DIR . basename( __FILE__ ) );
+\define( 'ACTIVITYPUB_PLUGIN_URL', plugin_dir_url( __FILE__ ) );
+
 require_once __DIR__ . '/includes/compat.php';
 require_once __DIR__ . '/includes/functions.php';
 require_once __DIR__ . '/includes/constants.php';
diff --git a/includes/constants.php b/includes/constants.php
index a6305f150..e90977eb4 100644
--- a/includes/constants.php
+++ b/includes/constants.php
@@ -68,9 +68,3 @@
 \define( 'ACTIVITYPUB_CONTENT_VISIBILITY_PUBLIC', '' );
 \define( 'ACTIVITYPUB_CONTENT_VISIBILITY_QUIET_PUBLIC', 'quiet_public' );
 \define( 'ACTIVITYPUB_CONTENT_VISIBILITY_LOCAL', 'local' );
-
-// Plugin related constants.
-\define( 'ACTIVITYPUB_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
-\define( 'ACTIVITYPUB_PLUGIN_BASENAME', plugin_basename( __FILE__ ) );
-\define( 'ACTIVITYPUB_PLUGIN_FILE', ACTIVITYPUB_PLUGIN_DIR . basename( __FILE__ ) );
-\define( 'ACTIVITYPUB_PLUGIN_URL', plugin_dir_url( __FILE__ ) );