diff --git a/libreplan-business/src/main/java/org/libreplan/business/calendars/entities/CalendarAvailability.java b/libreplan-business/src/main/java/org/libreplan/business/calendars/entities/CalendarAvailability.java
index 144cde82c..a9cf1c403 100644
--- a/libreplan-business/src/main/java/org/libreplan/business/calendars/entities/CalendarAvailability.java
+++ b/libreplan-business/src/main/java/org/libreplan/business/calendars/entities/CalendarAvailability.java
@@ -150,8 +150,8 @@ public class CalendarAvailability extends IntegrationEntity {
         }
 
         if (endDate == null) {
-            return startDate.compareTo(filterStartDate) >= 0
-                    && startDate.compareTo(filterEndDate) <= 0;
+            return startDate.compareTo(filterStartDate) <= 0
+                    || startDate.compareTo(filterEndDate) <= 0;
         }
 
         Interval filterPeriod = new Interval(