diff --git a/lib/org/openpsa/expenses/hour/report.php b/lib/org/openpsa/expenses/hour/report.php
index 4767b9169..a31263385 100644
--- a/lib/org/openpsa/expenses/hour/report.php
+++ b/lib/org/openpsa/expenses/hour/report.php
@@ -120,7 +120,7 @@ public function modify_hours_by_time_slot()
                     $time_slot = 1;
                 }
             }
-            $this->hours = max(1, round($this->hours / $time_slot)) * $time_slot;
+            $this->hours = ceil($this->hours / $time_slot) * $time_slot;
         }
     }