diff --git a/workflow/engine/classes/Calendar.php b/workflow/engine/classes/Calendar.php
index fe49aca98..2f788a442 100644
--- a/workflow/engine/classes/Calendar.php
+++ b/workflow/engine/classes/Calendar.php
@@ -828,7 +828,7 @@ class Calendar extends CalendarDefinition
     			$newDate = $onlyDate;
     			$hoursDuration -= (float)($secondRes/3600);
     		} else {
-    			$newDate = date('Y-m-d H:i:s', strtotime('+' . round((((float)$hoursDuration)*3600), 5) . ' seconds', strtotime($newDate)));
+    			$newDate = date('Y-m-d H:i:s', strtotime('+' . (((float)$hoursDuration)*3600) . ' seconds', strtotime($newDate)));
     			$hoursDuration = 0;
     		}
     	}