diff --git a/components/livestatus/hoststable.cpp b/components/livestatus/hoststable.cpp
index 42df97add..cefd68923 100644
--- a/components/livestatus/hoststable.cpp
+++ b/components/livestatus/hoststable.cpp
@@ -1088,7 +1088,15 @@ Value HostsTable::ContactsAccessor(const Value& row)
 	if (!hc)
 		return Empty;
 
-	return CompatUtility::GetServiceNotificationUsers(hc);
+	Array::Ptr contacts = CompatUtility::GetServiceNotificationUsers(hc);
+	Array::Ptr contact_names = boost::make_shared<Array>();
+
+	ObjectLock olock(contacts);
+	BOOST_FOREACH(const User::Ptr& user, contacts) {
+		contact_names->Add(user->GetName());
+	}
+
+	return contact_names;
 }
 
 Value HostsTable::DowntimesAccessor(const Value& row)
@@ -1581,7 +1589,16 @@ Value HostsTable::ContactGroupsAccessor(const Value& row)
 	if (!hc)
 		return Empty;
 
-	return CompatUtility::GetServiceNotificationUserGroups(hc);
+	Array::Ptr contactgroups = CompatUtility::GetServiceNotificationUserGroups(hc);
+
+	Array::Ptr contactgroup_names = boost::make_shared<Array>();
+
+	ObjectLock olock(contactgroups);
+	BOOST_FOREACH(const UserGroup::Ptr& usergroup, contactgroups) {
+		contactgroup_names->Add(usergroup->GetName());
+	}
+
+	return contactgroup_names;
 }
 
 Value HostsTable::ServicesAccessor(const Value& row)
diff --git a/components/livestatus/servicestable.cpp b/components/livestatus/servicestable.cpp
index 89a0d0d15..396b4b1e7 100644
--- a/components/livestatus/servicestable.cpp
+++ b/components/livestatus/servicestable.cpp
@@ -751,7 +751,15 @@ Value ServicesTable::InNotificationPeriodAccessor(const Value& row)
 
 Value ServicesTable::ContactsAccessor(const Value& row)
 {
-	return CompatUtility::GetServiceNotificationUsers(static_cast<Service::Ptr>(row));
+	Array::Ptr contacts = CompatUtility::GetServiceNotificationUsers(static_cast<Service::Ptr>(row));
+	Array::Ptr contact_names = boost::make_shared<Array>();
+
+	ObjectLock olock(contacts);
+	BOOST_FOREACH(const User::Ptr& user, contacts) {
+		contact_names->Add(user->GetName());
+	}
+
+	return contact_names;
 }
 
 Value ServicesTable::DowntimesAccessor(const Value& row)
@@ -1002,7 +1010,16 @@ Value ServicesTable::GroupsAccessor(const Value& row)
 
 Value ServicesTable::ContactGroupsAccessor(const Value& row)
 {
-	return CompatUtility::GetServiceNotificationUserGroups(static_cast<Service::Ptr>(row));
+	Array::Ptr contactgroups = CompatUtility::GetServiceNotificationUserGroups(static_cast<Service::Ptr>(row));
+
+	Array::Ptr contactgroup_names = boost::make_shared<Array>();
+
+	ObjectLock olock(contactgroups);
+	BOOST_FOREACH(const UserGroup::Ptr& usergroup, contactgroups) {
+		contactgroup_names->Add(usergroup->GetName());
+	}
+
+	return contactgroup_names;
 }
 
 
diff --git a/lib/icinga/compatutility.cpp b/lib/icinga/compatutility.cpp
index e59346e2d..9fa6b96d8 100644
--- a/lib/icinga/compatutility.cpp
+++ b/lib/icinga/compatutility.cpp
@@ -504,7 +504,7 @@ Value CompatUtility::GetServiceNotificationUsers(const Service::Ptr& service)
         }
 
 	BOOST_FOREACH(const User::Ptr& user, allUsers) {
-		contacts->Add(user->GetName());
+		contacts->Add(user);
 	}
 
 	return contacts;
@@ -519,7 +519,7 @@ Value CompatUtility::GetServiceNotificationUserGroups(const Service::Ptr& servic
 		ObjectLock olock(notification);
 
 		BOOST_FOREACH(const UserGroup::Ptr& ug, notification->GetUserGroups()) {
-			contactgroups->Add(ug->GetName());
+			contactgroups->Add(ug);
                 }
         }