diff --git a/includes/class-scliveticker.php b/includes/class-scliveticker.php
index 92ffe61..5154516 100644
--- a/includes/class-scliveticker.php
+++ b/includes/class-scliveticker.php
@@ -72,7 +72,7 @@ class SCLiveticker {
 		self::update_options();
 
 		// Add filter for REST API queries.
-		add_filter( 'rest_api_init', array( 'SCLiveticker\\Api', 'init' ) );
+		add_action( 'rest_api_init', array( 'SCLiveticker\\Api', 'init' ) );
 		add_filter( 'rest_scliveticker_tick_query', array( 'SCLiveticker\\Api', 'tick_query_filter' ), 10, 2 );
 
 		// Skip on AJAX if not enabled.