diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/ResourceAllocation.java b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/ResourceAllocation.java
index bf41227fc..961fe63cd 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/ResourceAllocation.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/ResourceAllocation.java
@@ -328,12 +328,14 @@ public abstract class ResourceAllocation<T extends DayAssignment> extends
             Validate.isTrue(startInclusive.compareTo(endExclusive) <= 0,
                     "the end must be equal or posterior than start");
             List<T> assignmentsCreated = new ArrayList<T>();
-            List<LocalDate> days = getDays(startInclusive, endExclusive);
-            int[] hoursEachDay = hoursDistribution(days, hours);
-            int i = 0;
-            for (LocalDate day : getDays(startInclusive, endExclusive)) {
-                assignmentsCreated.addAll(distributeForDay(day,
-                        hoursEachDay[i++]));
+            if (hours > 0) {
+                List<LocalDate> days = getDays(startInclusive, endExclusive);
+                int[] hoursEachDay = hoursDistribution(days, hours);
+                int i = 0;
+                for (LocalDate day : getDays(startInclusive, endExclusive)) {
+                    assignmentsCreated.addAll(distributeForDay(day,
+                            hoursEachDay[i++]));
+                }
             }
             removingAssignments(getAssignments(startInclusive, endExclusive));
             addingAssignments(assignmentsCreated);
diff --git a/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/SpecificResourceAllocationTest.java b/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/SpecificResourceAllocationTest.java
index 64d5d0528..5f30bf08e 100644
--- a/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/SpecificResourceAllocationTest.java
+++ b/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/SpecificResourceAllocationTest.java
@@ -220,6 +220,18 @@ public class SpecificResourceAllocationTest {
                 3, 3));
     }
 
+    @Test
+    public void allocatingZeroHoursOnIntervalRemovesThem() {
+        givenResourceCalendarAlwaysReturning(3);
+        LocalDate start = new LocalDate(2000, 2, 4);
+        givenSpecificResourceAllocation(start, 4);
+        specificResourceAllocation.allocate(ResourcesPerDay.amount(1));
+        specificResourceAllocation.onInterval(start, start.plusDays(2))
+                .allocateHours(0);
+        assertThat(specificResourceAllocation.getAssignments(), from(start
+                .plusDays(2)));
+    }
+
     @Test
     public void theResourcesPerDayAreRecalculatedWhenAllocationHoursOnInterval() {
         givenResourceCalendarAlwaysReturning(3);