diff --git a/containment.cpp b/containment.cpp
index a38c8aec3..782c64842 100644
--- a/containment.cpp
+++ b/containment.cpp
@@ -479,25 +479,6 @@ Location Containment::location() const
     return d->location;
 }
 
-void Containment::toggleDesktopImmutability()
-{
-    if (corona()) {
-        if (corona()->immutability() == NotImmutable) { 
-            corona()->setImmutability(UserImmutable);
-        } else if (corona()->immutability() == UserImmutable) { 
-            corona()->setImmutability(NotImmutable);
-        }
-    } else {
-        if (immutability() == NotImmutable) {
-            setImmutability(UserImmutable);
-        } else if (immutability() == UserImmutable) { 
-            setImmutability(NotImmutable);
-        }
-    }
-
-    d->setLockToolText();
-}
-
 void Containment::addSiblingContainment()
 {
     emit addSiblingContainment(this);
@@ -894,6 +875,25 @@ void Containment::closeToolBox()
 
 // Private class implementation
 
+void Containment::Private::toggleDesktopImmutability()
+{
+    if (q->corona()) {
+        if (q->corona()->immutability() == NotImmutable) { 
+            q->corona()->setImmutability(UserImmutable);
+        } else if (q->corona()->immutability() == UserImmutable) { 
+            q->corona()->setImmutability(NotImmutable);
+        }
+    } else {
+        if (q->immutability() == NotImmutable) {
+            q->setImmutability(UserImmutable);
+        } else if (q->immutability() == UserImmutable) { 
+            q->setImmutability(NotImmutable);
+        }
+    }
+
+    setLockToolText();
+}
+
 void Containment::Private::zoomIn()
 {
     emit q->zoomRequested(q, Plasma::ZoomIn);
diff --git a/containment.h b/containment.h
index 607bcdb05..a0d7ed618 100644
--- a/containment.h
+++ b/containment.h
@@ -333,13 +333,6 @@ class PLASMA_EXPORT Containment : public Applet
          */
         void setFormFactor(Plasma::FormFactor formFactor);
 
-        /**
-         * Locks or unlocks plasma's applets.
-         * When plasma is locked, applets cannot be transformed, added or deleted
-         * but they can still be configured.
-         */
-        void toggleDesktopImmutability();
-
         /**
          * Tells the corona to create a new desktop containment
          */
@@ -383,6 +376,7 @@ class PLASMA_EXPORT Containment : public Applet
         Q_PRIVATE_SLOT(d, void positionToolBox())
         Q_PRIVATE_SLOT(d, void zoomIn())
         Q_PRIVATE_SLOT(d, void zoomOut())
+        Q_PRIVATE_SLOT(d, void toggleDesktopImmutability());
 
         friend class Applet;
         class Private;
diff --git a/containment_p.h b/containment_p.h
index e743fe046..55257ed9c 100644
--- a/containment_p.h
+++ b/containment_p.h
@@ -72,6 +72,13 @@ public:
     void zoomIn();
     void zoomOut();
 
+    /**
+     * Locks or unlocks plasma's applets.
+     * When plasma is locked, applets cannot be transformed, added or deleted
+     * but they can still be configured.
+     */
+    void toggleDesktopImmutability();
+
     Applet* addApplet(const QString& name, const QVariantList& args = QVariantList(),
                       const QRectF &geometry = QRectF(-1, -1, -1, -1), uint id = 0,
                       bool delayedInit = false);