diff --git a/src/server/idle_interface.cpp b/src/server/idle_interface.cpp
index 1fec113..ccacac2 100644
--- a/src/server/idle_interface.cpp
+++ b/src/server/idle_interface.cpp
@@ -1,268 +1,269 @@
 /********************************************************************
 Copyright 2015  Martin Gräßlin <mgraesslin@kde.org>
 
 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) version 3, or any
 later version accepted by the membership of KDE e.V. (or its
 successor approved by the membership of KDE e.V.), which shall
 act as a proxy defined in Section 6 of version 3 of the license.
 
 This library is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Lesser General Public License for more details.
 
 You should have received a copy of the GNU Lesser General Public
 License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************/
 #include "idle_interface.h"
 #include "display.h"
 #include "global_p.h"
 #include "resource_p.h"
 #include "seat_interface.h"
 
 #include <QTimer>
 
+#include <functional>
 #include <wayland-server.h>
 #include <wayland-idle-server-protocol.h>
 
 namespace KWayland
 {
 namespace Server
 {
 
 class IdleInterface::Private : public Global::Private
 {
 public:
     Private(IdleInterface *q, Display *d);
 
     int inhibitCount = 0;
     QVector<IdleTimeoutInterface*> idleTimeouts;
 
 private:
     void bind(wl_client *client, uint32_t version, uint32_t id) override;
     static void getIdleTimeoutCallback(wl_client *client, wl_resource *resource, uint32_t id, wl_resource *seat, uint32_t timeout);
 
     static void unbind(wl_resource *resource);
     static Private *cast(wl_resource *r) {
         return reinterpret_cast<Private*>(wl_resource_get_user_data(r));
     }
 
     IdleInterface *q;
     static const struct org_kde_kwin_idle_interface s_interface;
     static const quint32 s_version;
 };
 
 class IdleTimeoutInterface::Private : public Resource::Private
 {
 public:
     Private(SeatInterface *seat, IdleTimeoutInterface *q, IdleInterface *manager, wl_resource *parentResource);
     ~Private();
     void setup(quint32 timeout);
 
     void simulateUserActivity();
 
     SeatInterface *seat;
     QTimer *timer = nullptr;
 
 private:
     static void simulateUserActivityCallback(wl_client *client, wl_resource *resource);
     IdleTimeoutInterface *q_func() {
         return reinterpret_cast<IdleTimeoutInterface*>(q);
     }
     static const struct org_kde_kwin_idle_timeout_interface s_interface;
 };
 
 const quint32 IdleInterface::Private::s_version = 1;
 
 #ifndef DOXYGEN_SHOULD_SKIP_THIS
 const struct org_kde_kwin_idle_interface IdleInterface::Private::s_interface = {
     getIdleTimeoutCallback
 };
 #endif
 
 IdleInterface::Private::Private(IdleInterface *q, Display *d)
     : Global::Private(d, &org_kde_kwin_idle_interface, s_version)
     , q(q)
 {
 }
 
 void IdleInterface::Private::getIdleTimeoutCallback(wl_client *client, wl_resource *resource, uint32_t id, wl_resource *seat, uint32_t timeout)
 {
     Private *p = cast(resource);
     SeatInterface *s = SeatInterface::get(seat);
     Q_ASSERT(s);
     IdleTimeoutInterface *idleTimeout = new IdleTimeoutInterface(s, p->q, resource);
     idleTimeout->create(p->display->getConnection(client), wl_resource_get_version(resource), id);
     if (!idleTimeout->resource()) {
         wl_resource_post_no_memory(resource);
         delete idleTimeout;
         return;
     }
     p->idleTimeouts << idleTimeout;
     QObject::connect(idleTimeout, &IdleTimeoutInterface::aboutToBeUnbound, p->q,
                      std::bind(&QVector<IdleTimeoutInterface*>::removeOne, p->idleTimeouts, idleTimeout));
     idleTimeout->d_func()->setup(timeout);
 }
 
 void IdleInterface::Private::bind(wl_client *client, uint32_t version, uint32_t id)
 {
     auto c = display->getConnection(client);
     wl_resource *resource = c->createResource(&org_kde_kwin_idle_interface, qMin(version, s_version), id);
     if (!resource) {
         wl_client_post_no_memory(client);
         return;
     }
     wl_resource_set_implementation(resource, &s_interface, this, unbind);
     // TODO: should we track?
 }
 
 void IdleInterface::Private::unbind(wl_resource *resource)
 {
     Q_UNUSED(resource)
 }
 
 IdleInterface::IdleInterface(Display *display, QObject *parent)
     : Global(new Private(this, display), parent)
 {
 }
 
 IdleInterface::~IdleInterface() = default;
 
 void IdleInterface::inhibit()
 {
     Q_D();
     d->inhibitCount++;
     if (d->inhibitCount == 1) {
         emit inhibitedChanged();
     }
 }
 
 void IdleInterface::uninhibit()
 {
     Q_D();
     d->inhibitCount--;
     if (d->inhibitCount == 0) {
         emit inhibitedChanged();
     }
 }
 
 bool IdleInterface::isInhibited() const
 {
     Q_D();
     return d->inhibitCount > 0;
 }
 
 void IdleInterface::simulateUserActivity()
 {
     Q_D();
     for (auto i : qAsConst(d->idleTimeouts)) {
         i->d_func()->simulateUserActivity();
     }
 }
 
 IdleInterface::Private *IdleInterface::d_func() const
 {
     return reinterpret_cast<Private*>(d.data());
 }
 
 #ifndef DOXYGEN_SHOULD_SKIP_THIS
 const struct org_kde_kwin_idle_timeout_interface IdleTimeoutInterface::Private::s_interface = {
     resourceDestroyedCallback,
     simulateUserActivityCallback
 };
 #endif
 
 IdleTimeoutInterface::Private::Private(SeatInterface *seat, IdleTimeoutInterface *q, IdleInterface *manager, wl_resource *parentResource)
     : Resource::Private(q, manager, parentResource, &org_kde_kwin_idle_timeout_interface, &s_interface)
     , seat(seat)
 {
 }
 
 IdleTimeoutInterface::Private::~Private() = default;
 
 void IdleTimeoutInterface::Private::simulateUserActivityCallback(wl_client *client, wl_resource *resource)
 {
     Q_UNUSED(client);
     Private *p = reinterpret_cast<Private*>(wl_resource_get_user_data(resource));
     p->simulateUserActivity();
 }
 
 void IdleTimeoutInterface::Private::simulateUserActivity()
 {
     if (!timer) {
         // not yet configured
         return;
     }
     if (qobject_cast<IdleInterface*>(global)->isInhibited()) {
         // ignored while inhibited
         return;
     }
     if (!timer->isActive() && resource) {
         org_kde_kwin_idle_timeout_send_resumed(resource);
     }
     timer->start();
 }
 
 void IdleTimeoutInterface::Private::setup(quint32 timeout)
 {
     if (timer) {
         return;
     }
     timer = new QTimer(q);
     timer->setSingleShot(true);
     // less than 5 sec is not idle by definition
     timer->setInterval(qMax(timeout, 5000u));
     QObject::connect(timer, &QTimer::timeout, q,
         [this] {
             if (resource) {
                 org_kde_kwin_idle_timeout_send_idle(resource);
             }
         }
     );
     if (qobject_cast<IdleInterface*>(global)->isInhibited()) {
         // don't start if inhibited
         return;
     }
     timer->start();
 }
 
 IdleTimeoutInterface::IdleTimeoutInterface(SeatInterface *seat, IdleInterface *parent, wl_resource *parentResource)
     : Resource(new Private(seat, this, parent, parentResource))
 {
     connect(seat, &SeatInterface::timestampChanged, this,
         [this] {
             Q_D();
             d->simulateUserActivity();
         }
     );
     connect(parent, &IdleInterface::inhibitedChanged, this,
         [this] {
             Q_D();
             if (!d->timer) {
                 // not yet configured
                 return;
             }
             if (qobject_cast<IdleInterface*>(d->global)->isInhibited()) {
                 if (!d->timer->isActive() && d->resource) {
                     org_kde_kwin_idle_timeout_send_resumed(d->resource);
                 }
                 d->timer->stop();
             } else {
                 d->timer->start();
             }
         }
     );
 }
 
 IdleTimeoutInterface::~IdleTimeoutInterface() = default;
 
 IdleTimeoutInterface::Private *IdleTimeoutInterface::d_func() const
 {
     return reinterpret_cast<IdleTimeoutInterface::Private*>(d.data());
 }
 
 }
 }