diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/planner/daos/DayAssignmentDAO.java b/navalplanner-business/src/main/java/org/navalplanner/business/planner/daos/DayAssignmentDAO.java
index e8b33b8f1..02b076cb2 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/planner/daos/DayAssignmentDAO.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/planner/daos/DayAssignmentDAO.java
@@ -80,14 +80,8 @@ public class DayAssignmentDAO extends GenericDAOHibernate<DayAssignment, Long>
             criteria.setProjection(Projections.projectionList().add(
                     Property.forName("day").group()).add(
                     Projections.sum("hours")));
-
             List<Object[]> list = criteria.list();
-
-            for (Object[] object : list) {
-                LocalDate date = (LocalDate) object[0];
-                Integer hours = (Integer) object[1];
-                result.put(date, hours.intValue());
-            }
+            addHoursByDate(result, list);
         }
 
         if (!specificResourceAllocations.isEmpty()) {
@@ -101,22 +95,22 @@ public class DayAssignmentDAO extends GenericDAOHibernate<DayAssignment, Long>
                     Projections.sum("hours")));
 
             List<Object[]> list = criteria.list();
-
-            for (Object[] object : list) {
-                LocalDate date = (LocalDate) object[0];
-                Integer hours = (Integer) object[1];
-
-                if (result.get(date) == null) {
-                    result.put(date, hours.intValue());
-                } else {
-                    result.put(date, result.get(date) + hours.intValue());
-                }
-            }
+            addHoursByDate(result, list);
         }
 
         return result;
     }
 
+    private void addHoursByDate(SortedMap<LocalDate, Integer> result,
+            List<Object[]> list) {
+        for (Object[] object : list) {
+            LocalDate date = (LocalDate) object[0];
+            Integer hours = (Integer) object[1];
+            int current = result.get(date) != null ? result.get(date) : 0;
+            result.put(date, current + hours);
+        }
+    }
+
     private <T extends BaseEntity> List<T> withId(List<T> elements) {
         List<T> result = new ArrayList<T>();
         for (T element : elements) {