diff --git a/src/wayland/server/buffer_interface.cpp b/src/wayland/server/buffer_interface.cpp
index d511940935..cd6b7baca9 100644
--- a/src/wayland/server/buffer_interface.cpp
+++ b/src/wayland/server/buffer_interface.cpp
@@ -25,50 +25,70 @@ namespace KWayland
 namespace Server
 {
 
+class BufferInterface::Private
+{
+public:
+    Private(wl_resource *resource, SurfaceInterface *parent);
+    QImage::Format format() const;
+    void createImage();
+    void releaseImage();
+    wl_resource *buffer;
+    wl_shm_buffer *shmBuffer;
+    SurfaceInterface *surface;
+    int refCount;
+    QImage image;
+};
+
+BufferInterface::Private::Private(wl_resource *resource, SurfaceInterface *parent)
+    : buffer(resource)
+    , shmBuffer(wl_shm_buffer_get(resource))
+    , surface(parent)
+    , refCount(0)
+{
+}
+
+
 BufferInterface::BufferInterface(wl_resource *resource, SurfaceInterface *parent)
     : QObject(parent)
-    , m_buffer(resource)
-    , m_shmBuffer(wl_shm_buffer_get(m_buffer))
-    , m_surface(parent)
-    , m_refCount(0)
+    , d(new Private(resource, parent))
 {
 }
 
 BufferInterface::~BufferInterface()
 {
-    Q_ASSERT(m_refCount == 0);
-    releaseImage();
+    Q_ASSERT(d->refCount == 0);
+    d->releaseImage();
 }
 
-void BufferInterface::releaseImage()
+void BufferInterface::Private::releaseImage()
 {
-    if (m_image.isNull()) {
+    if (image.isNull()) {
         return;
     }
     // first destroy it
-    m_image = QImage();
-    wl_shm_buffer_end_access(m_shmBuffer);
+    image = QImage();
+    wl_shm_buffer_end_access(shmBuffer);
 }
 
 void BufferInterface::ref()
 {
-    m_refCount++;
+    d->refCount++;
 }
 
 void BufferInterface::unref()
 {
-    Q_ASSERT(m_refCount > 0);
-    m_refCount--;
-    if (m_refCount == 0) {
-        releaseImage();
-        wl_buffer_send_release(m_buffer);
+    Q_ASSERT(d->refCount > 0);
+    d->refCount--;
+    if (d->refCount == 0) {
+        d->releaseImage();
+        wl_buffer_send_release(d->buffer);
         deleteLater();
     }
 }
 
-QImage::Format BufferInterface::format() const
+QImage::Format BufferInterface::Private::format() const
 {
-    switch (wl_shm_buffer_get_format(m_shmBuffer)) {
+    switch (wl_shm_buffer_get_format(shmBuffer)) {
     case WL_SHM_FORMAT_ARGB8888:
         return QImage::Format_ARGB32;
     case WL_SHM_FORMAT_XRGB8888:
@@ -80,27 +100,42 @@ QImage::Format BufferInterface::format() const
 
 QImage BufferInterface::data()
 {
-    if (m_image.isNull()) {
-        createImage();
+    if (d->image.isNull()) {
+        d->createImage();
     }
-    return m_image;
+    return d->image;
 }
 
-void BufferInterface::createImage()
+void BufferInterface::Private::createImage()
 {
-    if (!m_shmBuffer) {
+    if (!shmBuffer) {
         return;
     }
     const QImage::Format imageFormat = format();
     if (imageFormat == QImage::Format_Invalid) {
         return;
     }
-    wl_shm_buffer_begin_access(m_shmBuffer);
-    m_image = QImage((const uchar*)wl_shm_buffer_get_data(m_shmBuffer),
-                     wl_shm_buffer_get_width(m_shmBuffer),
-                     wl_shm_buffer_get_height(m_shmBuffer),
-                     wl_shm_buffer_get_stride(m_shmBuffer),
-                     imageFormat);
+    wl_shm_buffer_begin_access(shmBuffer);
+    image = QImage((const uchar*)wl_shm_buffer_get_data(shmBuffer),
+                   wl_shm_buffer_get_width(shmBuffer),
+                   wl_shm_buffer_get_height(shmBuffer),
+                   wl_shm_buffer_get_stride(shmBuffer),
+                   imageFormat);
+}
+
+bool BufferInterface::isReferenced() const
+{
+    return d->refCount > 0;
+}
+
+SurfaceInterface *BufferInterface::surface() const
+{
+    return d->surface;
+}
+
+wl_shm_buffer *BufferInterface::shmBuffer()
+{
+    return d->shmBuffer;
 }
 
 }
diff --git a/src/wayland/server/buffer_interface.h b/src/wayland/server/buffer_interface.h
index 3d494d9de7..9cf84c5f3b 100644
--- a/src/wayland/server/buffer_interface.h
+++ b/src/wayland/server/buffer_interface.h
@@ -42,30 +42,18 @@ public:
     virtual ~BufferInterface();
     void ref();
     void unref();
-    bool isReferenced() const {
-        return m_refCount > 0;
-    }
+    bool isReferenced() const;
 
-    SurfaceInterface *surface() const {
-        return m_surface;
-    }
-    wl_shm_buffer *shmBuffer() {
-        return m_shmBuffer;
-    }
+    SurfaceInterface *surface() const;
+    wl_shm_buffer *shmBuffer();
 
     QImage data();
 
 private:
     friend class SurfaceInterface;
     explicit BufferInterface(wl_resource *resource, SurfaceInterface *parent);
-    QImage::Format format() const;
-    void createImage();
-    void releaseImage();
-    wl_resource *m_buffer;
-    wl_shm_buffer *m_shmBuffer;
-    SurfaceInterface *m_surface;
-    int m_refCount;
-    QImage m_image;
+    class Private;
+    QScopedPointer<Private> d;
 };
 
 }