diff --git a/src/Smappee.php b/src/Smappee.php
index c0f7469..2a1ad6c 100644
--- a/src/Smappee.php
+++ b/src/Smappee.php
@@ -185,7 +185,7 @@ public function getServiceLocationInfo($serviceLocationId)
         return $result;
     }
     
-    public function getConsumption($serviceLocationId, \DateTime $from, \DateTime $to, $aggregation = self::AGGREGATION_5MIN)
+    public function getConsumption($serviceLocationId, \DateTime $from, \DateTime $to, $aggregation = self::AGGREGATION_5MINS)
     {
         $serviceLocationId = (int)$serviceLocationId;