diff --git a/libreplan-business/src/main/java/org/libreplan/business/common/entities/Configuration.java b/libreplan-business/src/main/java/org/libreplan/business/common/entities/Configuration.java
index 5635becf3..2f05f98d4 100644
--- a/libreplan-business/src/main/java/org/libreplan/business/common/entities/Configuration.java
+++ b/libreplan-business/src/main/java/org/libreplan/business/common/entities/Configuration.java
@@ -23,6 +23,7 @@ package org.libreplan.business.common.entities;
 
 import org.apache.commons.lang.StringUtils;
 import org.hibernate.validator.AssertTrue;
+import org.hibernate.validator.Min;
 import org.hibernate.validator.NotEmpty;
 import org.hibernate.validator.NotNull;
 import org.libreplan.business.calendars.entities.BaseCalendar;
@@ -113,6 +114,8 @@ public class Configuration extends BaseEntity {
 
     private PersonalTimesheetsPeriodicityEnum personalTimesheetsPeriodicity = PersonalTimesheetsPeriodicityEnum.MONTHLY;
 
+    private Integer secondsPlanningWarning = 30;
+
     /**
      * Maximum users configurable directly in database for SaaS products. If
      * zero it means that there isn't any limitation.
@@ -490,4 +493,14 @@ public class Configuration extends BaseEntity {
         return maxResources;
     }
 
+    @Min(value = 0, message = "seconds planning warning cannot be negative")
+    @NotNull(message = "seconds planning warning not specified")
+    public Integer getSecondsPlanningWarning() {
+        return secondsPlanningWarning;
+    }
+
+    public void setSecondsPlanningWarning(Integer secondsPlanningWarning) {
+        this.secondsPlanningWarning = secondsPlanningWarning;
+    }
+
 }
diff --git a/libreplan-business/src/main/resources/db.changelog-1.3.xml b/libreplan-business/src/main/resources/db.changelog-1.3.xml
index a4dbcdcdf..8da319d91 100644
--- a/libreplan-business/src/main/resources/db.changelog-1.3.xml
+++ b/libreplan-business/src/main/resources/db.changelog-1.3.xml
@@ -193,4 +193,19 @@
             constraintName="order_element_code_key" />
     </changeSet>
 
+    <changeSet id="add-seconds_planning_warning-column-to-configuration"
+        author="mrego">
+        <comment>Add seconds_planning_warning column to configuration</comment>
+        <addColumn tableName="configuration">
+            <column name="seconds_planning_warning" type="INTEGER" />
+        </addColumn>
+        <update tableName="configuration">
+            <column name="seconds_planning_warning" value="30" />
+        </update>
+        <addNotNullConstraint tableName="configuration"
+            columnName="seconds_planning_warning"
+            defaultNullValue="30"
+            columnDataType="INTEGER" />
+    </changeSet>
+
 </databaseChangeLog>
diff --git a/libreplan-business/src/main/resources/org/libreplan/business/common/entities/Configuration.hbm.xml b/libreplan-business/src/main/resources/org/libreplan/business/common/entities/Configuration.hbm.xml
index 0a4ee5f13..afc2a504c 100644
--- a/libreplan-business/src/main/resources/org/libreplan/business/common/entities/Configuration.hbm.xml
+++ b/libreplan-business/src/main/resources/org/libreplan/business/common/entities/Configuration.hbm.xml
@@ -91,6 +91,9 @@
         <property name="maxUsers" column="max_users" />
         <property name="maxResources" column="max_resources" />
 
+        <property name="secondsPlanningWarning" not-null="true"
+            column="seconds_planning_warning" />
+
         <component name="ldapConfiguration" class="org.libreplan.business.common.entities.LDAPConfiguration">
             <property name="ldapHost" column="ldap_host"/>
             <property name="ldapPort" column="ldap_port"/>
diff --git a/libreplan-webapp/src/main/java/org/libreplan/web/common/ConfigurationController.java b/libreplan-webapp/src/main/java/org/libreplan/web/common/ConfigurationController.java
index 218cb25c7..6389d0781 100644
--- a/libreplan-webapp/src/main/java/org/libreplan/web/common/ConfigurationController.java
+++ b/libreplan-webapp/src/main/java/org/libreplan/web/common/ConfigurationController.java
@@ -915,4 +915,12 @@ public class ConfigurationController extends GenericForwardComposer {
         return "";
     }
 
+    public Integer getSecondsPlanningWarning() {
+        return configurationModel.getSecondsPlanningWarning();
+    }
+
+    public void setSecondsPlanningWarning(Integer secondsPlanningWarning) {
+        configurationModel.setSecondsPlanningWarning(secondsPlanningWarning);
+    }
+
 }
diff --git a/libreplan-webapp/src/main/java/org/libreplan/web/common/ConfigurationModel.java b/libreplan-webapp/src/main/java/org/libreplan/web/common/ConfigurationModel.java
index ccb6d75df..8227a0788 100644
--- a/libreplan-webapp/src/main/java/org/libreplan/web/common/ConfigurationModel.java
+++ b/libreplan-webapp/src/main/java/org/libreplan/web/common/ConfigurationModel.java
@@ -657,4 +657,14 @@ public class ConfigurationModel implements IConfigurationModel {
         return !workReportDAO.isAnyPersonalTimesheetAlreadySaved();
     }
 
+    @Override
+    public Integer getSecondsPlanningWarning() {
+        return configuration.getSecondsPlanningWarning();
+    }
+
+    @Override
+    public void setSecondsPlanningWarning(Integer secondsPlanningWarning) {
+        configuration.setSecondsPlanningWarning(secondsPlanningWarning);
+    }
+
 }
diff --git a/libreplan-webapp/src/main/java/org/libreplan/web/common/ConfirmCloseUtil.java b/libreplan-webapp/src/main/java/org/libreplan/web/common/ConfirmCloseUtil.java
index 23e2cb2c6..0b1617a7a 100644
--- a/libreplan-webapp/src/main/java/org/libreplan/web/common/ConfirmCloseUtil.java
+++ b/libreplan-webapp/src/main/java/org/libreplan/web/common/ConfirmCloseUtil.java
@@ -18,6 +18,7 @@
  */
 package org.libreplan.web.common;
 
+import org.libreplan.business.common.Registry;
 import org.zkoss.ganttz.util.LongOperationFeedback;
 import org.zkoss.ganttz.util.LongOperationFeedback.IBackGroundOperation;
 import org.zkoss.ganttz.util.LongOperationFeedback.IDesktopUpdate;
@@ -32,37 +33,41 @@ import org.zkoss.zk.ui.util.Clients;
  */
 public class ConfirmCloseUtil {
 
-    private static final int WARNING_ON_EXIT_MS = 30000; // 30 seconds
-
     public static void resetConfirmClose() {
         Clients.confirmClose(null);
     }
 
     public static void setConfirmClose(Desktop desktop, final String message) {
-        LongOperationFeedback
-                .progressive(
-                        desktop,
-                        new IBackGroundOperation<LongOperationFeedback.IDesktopUpdate>() {
+        final Integer seconds = Registry.getConfigurationDAO()
+                .getConfigurationWithReadOnlyTransaction()
+                .getSecondsPlanningWarning();
 
-                            @Override
-                            public void doOperation(
-                                    IDesktopUpdatesEmitter<IDesktopUpdate> desktopUpdateEmitter) {
-                                try {
-                                    Thread.sleep(WARNING_ON_EXIT_MS);
-                                } catch (InterruptedException e) {
-                                    throw new RuntimeException(e);
+        if (seconds > 0) {
+            LongOperationFeedback
+                    .progressive(
+                            desktop,
+                            new IBackGroundOperation<LongOperationFeedback.IDesktopUpdate>() {
+
+                                @Override
+                                public void doOperation(
+                                        IDesktopUpdatesEmitter<IDesktopUpdate> desktopUpdateEmitter) {
+                                    try {
+                                        Thread.sleep(seconds * 1000);
+                                    } catch (InterruptedException e) {
+                                        throw new RuntimeException(e);
+                                    }
+                                    desktopUpdateEmitter
+                                            .doUpdate(new IDesktopUpdate() {
+
+                                                @Override
+                                                public void doUpdate() {
+                                                    resetConfirmClose();
+                                                    Clients.confirmClose(message);
+                                                }
+                                            });
                                 }
-                                desktopUpdateEmitter
-                                        .doUpdate(new IDesktopUpdate() {
-
-                                            @Override
-                                            public void doUpdate() {
-                                                resetConfirmClose();
-                                                Clients.confirmClose(message);
-                                            }
-                                        });
-                            }
-                        });
+                            });
+        }
     }
 
-}
+}
\ No newline at end of file
diff --git a/libreplan-webapp/src/main/java/org/libreplan/web/common/IConfigurationModel.java b/libreplan-webapp/src/main/java/org/libreplan/web/common/IConfigurationModel.java
index 6430a17b8..ab8e0a22f 100644
--- a/libreplan-webapp/src/main/java/org/libreplan/web/common/IConfigurationModel.java
+++ b/libreplan-webapp/src/main/java/org/libreplan/web/common/IConfigurationModel.java
@@ -180,4 +180,9 @@ public interface IConfigurationModel {
 
     boolean isAnyPersonalTimesheetAlreadySaved();
 
+    Integer getSecondsPlanningWarning();
+
+    void setSecondsPlanningWarning(
+            Integer planningWarningExitWithoutSavingSeconds);
+
 }
diff --git a/libreplan-webapp/src/main/webapp/common/configuration.zul b/libreplan-webapp/src/main/webapp/common/configuration.zul
index 0c09fbb82..411a78169 100644
--- a/libreplan-webapp/src/main/webapp/common/configuration.zul
+++ b/libreplan-webapp/src/main/webapp/common/configuration.zul
@@ -209,6 +209,17 @@
                                     label="${i18n:_('MonteCarlo method')}"
                                     checked="@{configurationController.monteCarloMethodTabVisible}" />
                             </row>
+                            <row>
+                                <label
+                                    value="${i18n:_('Seconds planning warning')}" />
+                                <hbox>
+                                    <intbox width="50px"
+                                        value="@{configurationController.secondsPlanningWarning}"
+                                        constraint="no empty,no negative:${i18n:_('cannot be negative or empty')}" />
+                                    <label
+                                        value="${i18n:_('Defines the time since last saving operation at project planning perspectives after which a warning is raised on leaving. Set to 0 in order to disable the warning.')}" />
+                                </hbox>
+                            </row>
                         </rows>
                     </grid>
                 </tabpanel>