diff --git a/libs/PiwikTracker/PiwikTracker.php b/libs/PiwikTracker/PiwikTracker.php
index 3662e993f267733be0a579020d31c7c568daf017..635e3739b7fc9ea8c6566b6134de9b22caff511d 100644
--- a/libs/PiwikTracker/PiwikTracker.php
+++ b/libs/PiwikTracker/PiwikTracker.php
@@ -261,7 +261,7 @@ class PiwikTracker
      * Records a Goal conversion
      * 
      * @param int $idGoal Id Goal to record a conversion
-     * @param int $revenue Revenue for this conversion
+     * @param float $revenue Revenue for this conversion
      * @return string Response
      */
     public function doTrackGoal($idGoal, $revenue = false)
@@ -487,7 +487,7 @@ class PiwikTracker
     /**
      * @see doTrackGoal()
      * @param int $idGoal Id Goal to record a conversion
-     * @param int $revenue Revenue for this conversion
+     * @param float $revenue Revenue for this conversion
      * @return string URL to piwik.php with all parameters set to track the goal conversion
      */
     public function getUrlTrackGoal($idGoal, $revenue = false)