diff --git a/libreplan-business/src/main/java/org/libreplan/business/workreports/entities/WorkReportType.java b/libreplan-business/src/main/java/org/libreplan/business/workreports/entities/WorkReportType.java
index e77a9b48d..ef5652b2e 100644
--- a/libreplan-business/src/main/java/org/libreplan/business/workreports/entities/WorkReportType.java
+++ b/libreplan-business/src/main/java/org/libreplan/business/workreports/entities/WorkReportType.java
@@ -26,6 +26,7 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
+import org.apache.commons.lang.StringUtils;
 import org.hibernate.NonUniqueResultException;
 import org.hibernate.validator.AssertTrue;
 import org.hibernate.validator.NotEmpty;
@@ -522,4 +523,13 @@ public class WorkReportType extends IntegrationEntity implements IHumanIdentifia
     public String getHumanId() {
         return name;
     }
+
+    public boolean isMonthlyTimesheetsType() {
+        if (StringUtils.isBlank(name)) {
+            return false;
+        }
+        return name.equals(PredefinedWorkReportTypes.MONTHLY_TIMESHEETS
+                .getName());
+    }
+
 }
\ No newline at end of file
diff --git a/libreplan-webapp/src/main/java/org/libreplan/web/workreports/WorkReportTypeModel.java b/libreplan-webapp/src/main/java/org/libreplan/web/workreports/WorkReportTypeModel.java
index f5f580174..ee911b111 100644
--- a/libreplan-webapp/src/main/java/org/libreplan/web/workreports/WorkReportTypeModel.java
+++ b/libreplan-webapp/src/main/java/org/libreplan/web/workreports/WorkReportTypeModel.java
@@ -151,7 +151,7 @@ public class WorkReportTypeModel extends IntegrationEntityModel implements
     @Override
     @Transactional(readOnly = true)
     public void initEdit(WorkReportType workReportType) {
-        if (isMonthlyTimesheetsWorkReportType(workReportType)) {
+        if (workReportType.isMonthlyTimesheetsType()) {
             throw new IllegalArgumentException(
                     "Monthly timesheets work report type cannot be edited");
         }
@@ -166,12 +166,6 @@ public class WorkReportTypeModel extends IntegrationEntityModel implements
         initOldCodes();
     }
 
-    private boolean isMonthlyTimesheetsWorkReportType(
-            WorkReportType workReportType) {
-        return workReportType.getName().equals(
-                PredefinedWorkReportTypes.MONTHLY_TIMESHEETS.getName());
-    }
-
     private WorkReportType getFromDB(WorkReportType workReportType) {
         return getFromDB(workReportType.getId());
     }
@@ -226,7 +220,7 @@ public class WorkReportTypeModel extends IntegrationEntityModel implements
     @Override
     @Transactional
     public void confirmRemove(WorkReportType workReportType) {
-        if (isMonthlyTimesheetsWorkReportType(workReportType)) {
+        if (workReportType.isMonthlyTimesheetsType()) {
             throw new IllegalArgumentException(
                     "Monthly timesheets work report type cannot be removed");
         }