diff --git a/applet.cpp b/applet.cpp
index e3a33766e..421de4991 100644
--- a/applet.cpp
+++ b/applet.cpp
@@ -175,7 +175,7 @@ void Applet::restore(KConfigGroup *c)
 
     setZValue(z);
 
-    setImmutability((ImmutabilityType)c->readEntry("immutability", (int)NotImmutable));
+    setImmutability((ImmutabilityType)c->readEntry("immutability", (int)Mutable));
 }
 
 void Applet::setFailedToLaunch(bool failed, const QString& reason)
@@ -462,7 +462,7 @@ QString Applet::category(const QString& appletName)
 ImmutabilityType Applet::immutability() const
 {
     //Returning the more strict immutability between the applet immutability and Corona one
-    ImmutabilityType coronaImmutability = NotImmutable;
+    ImmutabilityType coronaImmutability = Mutable;
 
     if (dynamic_cast<Corona*>(scene())) {
         coronaImmutability = static_cast<Corona*>(scene())->immutability();
@@ -833,7 +833,7 @@ bool Applet::sceneEventFilter( QGraphicsItem * watched, QEvent * event )
 
 void Applet::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 {
-    if (d->immutability == NotImmutable && formFactor() == Plasma::Planar) {
+    if (d->immutability == Mutable && formFactor() == Plasma::Planar) {
         QGraphicsItem *parent = parentItem();
         Plasma::Applet *applet = qgraphicsitem_cast<Plasma::Applet*>(parent);
 
@@ -1180,7 +1180,7 @@ Applet::Private::Private(KService::Ptr service, int uniqueID, Applet *applet)
           mainConfig(0),
           pendingConstraints(NoConstraint),
           aspectRatioMode(Plasma::KeepAspectRatio),
-          immutability(NotImmutable),
+          immutability(Mutable),
           hasConfigurationInterface(false),
           failed(false),
           isContainment(false),
diff --git a/containment.cpp b/containment.cpp
index 2cbcf1a27..57d68db5d 100644
--- a/containment.cpp
+++ b/containment.cpp
@@ -302,7 +302,7 @@ void Containment::contextMenuEvent(QGraphicsSceneContextMenuEvent* event)
             }
         }
 
-        if (scene() && !static_cast<Corona*>(scene())->immutability() != NotImmutable) {
+        if (scene() && !static_cast<Corona*>(scene())->immutability() != Mutable) {
             if (hasEntries) {
                 desktopMenu.addSeparator();
             }
@@ -323,7 +323,7 @@ void Containment::contextMenuEvent(QGraphicsSceneContextMenuEvent* event)
             return;
         }
     } else {
-        if (!scene() || (static_cast<Corona*>(scene())->immutability() != NotImmutable && !KAuthorized::authorizeKAction("unlock_desktop"))) {
+        if (!scene() || (static_cast<Corona*>(scene())->immutability() != Mutable && !KAuthorized::authorizeKAction("unlock_desktop"))) {
             //kDebug() << "immutability";
             Applet::contextMenuEvent(event);
             return;
@@ -421,7 +421,7 @@ Applet* Containment::addApplet(const QString& name, const QVariantList& args, co
 //there.
 void Containment::addApplet(Applet *applet, const QPointF &pos, bool delayInit)
 {
-    if (!delayInit && immutability() != NotImmutable) {
+    if (!delayInit && immutability() != Mutable) {
         return;
     }
 
@@ -685,7 +685,7 @@ bool Containment::sceneEventFilter(QGraphicsItem *watched, QEvent *event)
     switch (event->type()) {
     case QEvent::GraphicsSceneHoverEnter:
         //kDebug() << "got hoverenterEvent" << immutability() << " " << applet->immutability();
-        if (immutability() == NotImmutable && applet->immutability() == NotImmutable) {
+        if (immutability() == Mutable && applet->immutability() == Mutable) {
             if (d->handles.contains(applet)) {
                 d->handles[applet]->startFading(AppletHandle::FadeIn);
             } else {
@@ -798,16 +798,16 @@ void Containment::closeToolBox()
 void Containment::Private::toggleDesktopImmutability()
 {
     if (q->corona()) {
-        if (q->corona()->immutability() == NotImmutable) { 
+        if (q->corona()->immutability() == Mutable) { 
             q->corona()->setImmutability(UserImmutable);
         } else if (q->corona()->immutability() == UserImmutable) { 
-            q->corona()->setImmutability(NotImmutable);
+            q->corona()->setImmutability(Mutable);
         }
     } else {
-        if (q->immutability() == NotImmutable) {
+        if (q->immutability() == Mutable) {
             q->setImmutability(UserImmutable);
         } else if (q->immutability() == UserImmutable) { 
-            q->setImmutability(NotImmutable);
+            q->setImmutability(Mutable);
         }
     }
 
@@ -881,7 +881,7 @@ void Containment::Private::setLockToolText()
     Icon *icon = dynamic_cast<Plasma::Icon*>(toolBox->tool("lockWidgets"));
     if (icon) {
         // we know it's an icon becase we made it
-        icon->setText(q->immutability() != NotImmutable ? i18n("Unlock Widgets") :
+        icon->setText(q->immutability() != Mutable ? i18n("Unlock Widgets") :
                                             i18n("Lock Widgets"));
         QSizeF iconSize = icon->sizeFromIconSize(22);
         icon->setMinimumSize(iconSize);
@@ -921,7 +921,7 @@ void Containment::Private::containmentConstraintsEvent(Plasma::Constraints const
         } else {
             toolBox->setPos(q->geometry().right() - qAbs(toolBox->boundingRect().width()), 0);
         }
-        toolBox->enableTool("addwidgets", q->immutability() == NotImmutable);
+        toolBox->enableTool("addwidgets", q->immutability() == Mutable);
     }
 
     if (constraints & Plasma::FormFactorConstraint) {
@@ -966,7 +966,7 @@ void Containment::Private::destroyApplet()
 Applet* Containment::Private::addApplet(const QString& name, const QVariantList& args,
                                         const QRectF& appletGeometry, uint id, bool delayInit)
 {
-    if (!delayInit && q->immutability() != NotImmutable) {
+    if (!delayInit && q->immutability() != Mutable) {
         kDebug() << "addApplet for" << name << "requested, but we're currently immutable!";
         return 0;
     }
diff --git a/corona.cpp b/corona.cpp
index 523cefdfd..30406bdb0 100644
--- a/corona.cpp
+++ b/corona.cpp
@@ -49,7 +49,7 @@ class Corona::Private
 public:
     Private(Corona *corona)
         : q(corona),
-          immutability(NotImmutable),
+          immutability(Mutable),
           mimetype("text/x-plasmoidservicename"),
           config(0)
     {
@@ -304,7 +304,7 @@ void Corona::loadLayout(const QString& configName)
     }
 
     KConfigGroup coronaConfig(config(), "General");
-    setImmutability((ImmutabilityType)coronaConfig.readEntry("immutability", (int)NotImmutable));
+    setImmutability((ImmutabilityType)coronaConfig.readEntry("immutability", (int)Mutable));
 }
 
 Containment* Corona::containmentForScreen(int screen) const
diff --git a/plasma.h b/plasma.h
index 5d74d0a73..f78a1dd37 100644
--- a/plasma.h
+++ b/plasma.h
@@ -146,7 +146,7 @@ enum ItemTypes { AppletType = QGraphicsItem::UserType + 1,
  * Defines the immutability of items like applets, corona and containments
  * they can be free to modify, locked down by the user or locked down by the system (e.g. kiosk setups)
  */
-enum ImmutabilityType { NotImmutable = 1 /**< The item can be modified in any way **/,
+enum ImmutabilityType { Mutable = 1 /**< The item can be modified in any way **/,
                         UserImmutable = 2 /**< The user has requested a lock down, and can undo the lock down at any time **/,
                         SystemImmutable = 4 /**<  the item is locked down by the system, the user can't unlock it **/