diff --git a/activitypub.php b/activitypub.php
index 69ecbaaf..dd404695 100644
--- a/activitypub.php
+++ b/activitypub.php
@@ -45,6 +45,10 @@ require_once __DIR__ . '/includes/functions.php';
 \defined( 'ACTIVITYPUB_SEND_VARY_HEADER' ) || \define( 'ACTIVITYPUB_SEND_VARY_HEADER', false );
 \defined( 'ACTIVITYPUB_DEFAULT_OBJECT_TYPE' ) || \define( 'ACTIVITYPUB_DEFAULT_OBJECT_TYPE', 'note' );
 
+\define( 'ACTIVITYPUB_ACTOR_MODE', '1' );
+\define( 'ACTIVITYPUB_BLOG_MODE', '2' );
+\define( 'ACTIVITYPUB_ACTOR_AND_BLOG_MODE', '3' );
+
 \define( 'ACTIVITYPUB_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
 \define( 'ACTIVITYPUB_PLUGIN_BASENAME', plugin_basename( __FILE__ ) );
 \define( 'ACTIVITYPUB_PLUGIN_FILE', plugin_dir_path( __FILE__ ) . '/' . basename( __FILE__ ) );
diff --git a/includes/class-migration.php b/includes/class-migration.php
index 4fda100f..d112fd7c 100644
--- a/includes/class-migration.php
+++ b/includes/class-migration.php
@@ -273,17 +273,17 @@ class Migration {
 			'1' === $blog_profile &&
 			'1' === $author_profiles
 		) {
-			\update_option( 'activitypub_actor_mode', '3' );
+			\update_option( 'activitypub_actor_mode', ACTIVITYPUB_ACTOR_AND_BLOG_MODE );
 		} elseif (
 			'1' === $blog_profile &&
 			'1' !== $author_profiles
 		) {
-			\update_option( 'activitypub_actor_mode', '2' );
+			\update_option( 'activitypub_actor_mode', ACTIVITYPUB_BLOG_MODE );
 		} elseif (
 			'1' !== $blog_profile &&
 			'1' === $author_profiles
 		) {
-			\update_option( 'activitypub_actor_mode', '1' );
+			\update_option( 'activitypub_actor_mode', ACTIVITYPUB_ACTOR_MODE );
 		}
 	}
 
diff --git a/includes/functions.php b/includes/functions.php
index 62a15355..8c157e74 100644
--- a/includes/functions.php
+++ b/includes/functions.php
@@ -479,7 +479,7 @@ function is_user_type_disabled( $type ) {
 				break;
 			}
 
-			if ( '1' === \get_option( 'activitypub_actor_mode', '1' ) ) {
+			if ( ACTIVITYPUB_ACTOR_MODE === \get_option( 'activitypub_actor_mode', ACTIVITYPUB_ACTOR_MODE ) ) {
 				$return = true;
 				break;
 			}
@@ -499,7 +499,7 @@ function is_user_type_disabled( $type ) {
 				break;
 			}
 
-			if ( '2' === \get_option( 'activitypub_actor_mode', '1' ) ) {
+			if ( ACTIVITYPUB_BLOG_MODE === \get_option( 'activitypub_actor_mode', ACTIVITYPUB_ACTOR_MODE ) ) {
 				$return = true;
 				break;
 			}
diff --git a/templates/settings.php b/templates/settings.php
index 85c9a9a8..55d2f917 100644
--- a/templates/settings.php
+++ b/templates/settings.php
@@ -26,7 +26,7 @@
 						<td>
 							<p>
 								<label>
-									<input type="radio" name="activitypub_actor_mode" id="activitypub_actor_mode" value="1" <?php echo \checked( '1', \get_option( 'activitypub_actor_mode', '1' ) ); ?> />
+									<input type="radio" name="activitypub_actor_mode" id="activitypub_actor_mode" value="<?php echo ACTIVITYPUB_ACTOR_MODE; ?>" <?php echo \checked( ACTIVITYPUB_ACTOR_MODE, \get_option( 'activitypub_actor_mode', ACTIVITYPUB_ACTOR_MODE ) ); ?> />
 									<strong><?php \esc_html_e( 'Author Profiles Only', 'activitypub' ); ?></strong>
 								</label>
 							</p>
@@ -38,7 +38,7 @@
 							</p>
 							<p>
 								<label>
-									<input type="radio" name="activitypub_actor_mode" id="activitypub_actor_mode" value="2" <?php echo \checked( '2', \get_option( 'activitypub_actor_mode', '1' ) ); ?> />
+									<input type="radio" name="activitypub_actor_mode" id="activitypub_actor_mode" value="<?php echo ACTIVITYPUB_BLOG_MODE; ?>" <?php echo \checked( ACTIVITYPUB_BLOG_MODE, \get_option( 'activitypub_actor_mode', ACTIVITYPUB_ACTOR_MODE ) ); ?> />
 									<strong><?php \esc_html_e( 'Blog Profile Only', 'activitypub' ); ?></strong>
 								</label>
 							</p>
@@ -47,7 +47,7 @@
 							</p>
 							<p>
 								<label>
-									<input type="radio" name="activitypub_actor_mode" id="activitypub_actor_mode" value="3" <?php echo \checked( '3', \get_option( 'activitypub_actor_mode', '1' ) ); ?> />
+									<input type="radio" name="activitypub_actor_mode" id="activitypub_actor_mode" value="<?php echo ACTIVITYPUB_ACTOR_AND_BLOG_MODE; ?>" <?php echo \checked( ACTIVITYPUB_ACTOR_AND_BLOG_MODE, \get_option( 'activitypub_actor_mode', ACTIVITYPUB_ACTOR_MODE ) ); ?> />
 									<strong><?php \esc_html_e( 'Author and Blog Profiles', 'activitypub' ); ?></strong>
 								</label>
 							</p>