diff --git a/containment.cpp b/containment.cpp
index a546721a8..6a58ccb84 100644
--- a/containment.cpp
+++ b/containment.cpp
@@ -972,7 +972,7 @@ bool Containment::drawWallpaper()
     return d->drawWallpaper;
 }
 
-void Containment::setWallpaper(const QString &pluginName, const QString &action)
+void Containment::setWallpaper(const QString &pluginName, const QString &mode)
 {
     delete d->wallpaper;
     if (!pluginName.isEmpty()) {
@@ -980,7 +980,7 @@ void Containment::setWallpaper(const QString &pluginName, const QString &action)
         setDrawWallpaper(d->wallpaper != 0);
         if (d->wallpaper) {
             d->wallpaper->setBoundingRect(geometry());
-            d->wallpaper->init(action);
+            d->wallpaper->init(mode);
             connect(d->wallpaper, SIGNAL(update(const QRectF&)),
                     this, SLOT(updateRect(const QRectF&)));
         }
@@ -990,7 +990,7 @@ void Containment::setWallpaper(const QString &pluginName, const QString &action)
     }
 }
 
-Plasma::Wallpaper* Containment::wallpaper()
+Plasma::Wallpaper* Containment::wallpaper() const
 {
     return d->wallpaper;
 }
diff --git a/containment.h b/containment.h
index adace97d3..413efd40a 100644
--- a/containment.h
+++ b/containment.h
@@ -282,13 +282,18 @@ class PLASMA_EXPORT Containment : public Applet
 
         /**
          * Sets wallpaper plugin.
+         *
+         * @param pluginName the name of the wallpaper to attempt to load
+         * @param mode optional mode or the wallpaper plugin (e.g. "Slideshow").
+         *        These values are pugin specific and enumerated in the plugin's
+         *        .desktop file.
          */
-        void setWallpaper(const QString &pluginName, const QString &action = QString());
+        void setWallpaper(const QString &pluginName, const QString &mode = QString());
 
        /**
          * Return wallpaper plugin.
          */
-        Plasma::Wallpaper* wallpaper();
+        Plasma::Wallpaper* wallpaper() const;
 
 
     Q_SIGNALS: