diff --git a/ai-simplesitestats.php b/ai-simplesitestats.php
index 1e8638902f891ddfba0dac8d3a2cb8a1186cb5b5..9995ba16a4d7bf5839593d7354d69ff77c6cb98e 100644
--- a/ai-simplesitestats.php
+++ b/ai-simplesitestats.php
@@ -146,5 +146,5 @@ function plugin_init() {
     $GLOBALS['ai-sss'] = new AiSSS();
 }
 
-add_action('init', __NAMESPACE__ . 'plugin_init');
+add_action('init', __NAMESPACE__ . '\\plugin_init');