diff --git a/src/Liuggio/StatsdClient/StatsdClient.php b/src/Liuggio/StatsdClient/StatsdClient.php
index c5c16fe..fa86b2f 100644
--- a/src/Liuggio/StatsdClient/StatsdClient.php
+++ b/src/Liuggio/StatsdClient/StatsdClient.php
@@ -91,7 +91,7 @@ private static function doReduce($reducedMetrics, $metric)
     public function reduceCount($arrayData)
     {
         if (is_array($arrayData)) {
-            $arrayData = array_reduce($arrayData, "self::doReduce", array());
+            $arrayData = array_reduce($arrayData, array(self::class, "doReduce"), array());
         }
 
         return $arrayData;