diff --git a/src/Attendance/Admin/Api/AttendanceAdminManager.php b/src/Attendance/Admin/Api/AttendanceAdminManager.php
index ab5107db..90f7c865 100644
--- a/src/Attendance/Admin/Api/AttendanceAdminManager.php
+++ b/src/Attendance/Admin/Api/AttendanceAdminManager.php
@@ -53,32 +53,32 @@ class AttendanceAdminManager extends AbstractModuleManager
         $this->addCalculationHook(
             'AttendanceUtil_getTimeWorkedHours',
             'Total Hours from Attendance',
-            'AttendanceUtil',
+            '\\Attendance\\Admin\\Api\\AttendanceUtil',
             'getTimeWorkedHours'
         );
 
         $this->addCalculationHook(
             'AttendanceUtil_getRegularWorkedHours',
             'Total Regular Hours from Attendance',
-            'AttendanceUtil',
+            '\\Attendance\\Admin\\Api\\AttendanceUtil',
             'getRegularWorkedHours'
         );
         $this->addCalculationHook(
             'AttendanceUtil_getOverTimeWorkedHours',
             'Total Overtime Hours from Attendance',
-            'AttendanceUtil',
+            '\\Attendance\\Admin\\Api\\AttendanceUtil',
             'getOverTimeWorkedHours'
         );
         $this->addCalculationHook(
             'AttendanceUtil_getWeeklyRegularWorkedHours',
             'Total Weekly Regular Hours from Attendance',
-            'AttendanceUtil',
+            '\\Attendance\\Admin\\Api\\AttendanceUtil',
             'getWeeklyBasedRegularHours'
         );
         $this->addCalculationHook(
             'AttendanceUtil_getWeeklyOverTimeWorkedHours',
             'Total Weekly Overtime Hours from Attendance',
-            'AttendanceUtil',
+            '\\Attendance\\Admin\\Api\\AttendanceUtil',
             'getWeeklyBasedOvertimeHours'
         );
     }
diff --git a/src/Attendance/Admin/Api/AttendanceUtil.php b/src/Attendance/Admin/Api/AttendanceUtil.php
index 966dbbd6..ee349c92 100644
--- a/src/Attendance/Admin/Api/AttendanceUtil.php
+++ b/src/Attendance/Admin/Api/AttendanceUtil.php
@@ -24,7 +24,7 @@ class AttendanceUtil
         );
 
         $atCalClassName = SettingsManager::getInstance()->getSetting('Attendance: Overtime Calculation Class');
-        $atCalClassName = '\\Attendance\\Common\\\Calculations\\'.$atCalClassName;
+        $atCalClassName = '\\Attendance\\Common\\Calculations\\'.$atCalClassName;
         $atCal = new $atCalClassName();
         $atSum = $atCal->getDataSeconds($atts, $startDate, true);