diff --git a/runner.cpp b/runner.cpp
index 400c05e58..4c9dd1bd9 100644
--- a/runner.cpp
+++ b/runner.cpp
@@ -22,6 +22,9 @@
 
 #include "runner.h"
 
+namespace Plasma
+{
+
 class Runner::Private
 {
     public:
@@ -113,4 +116,6 @@ Runner::List Runner::loadRunners( QWidget* parent )
     return runners;
 }
 
+} // Plasma namespace
+
 #include "runner.moc"
diff --git a/runner.h b/runner.h
index 9719a7b17..6a3f106aa 100644
--- a/runner.h
+++ b/runner.h
@@ -26,6 +26,9 @@
 
 class KActionCollection;
 
+namespace Plasma
+{
+
 class KDE_EXPORT Runner : public QObject
 {
     Q_OBJECT
@@ -111,6 +114,8 @@ class KDE_EXPORT Runner : public QObject
         void runExactMatch();
 };
 
+} // Plasma namespace
+
 #define K_EXPORT_KRUNNER_RUNNER( libname, classname )     \
     K_EXPORT_COMPONENT_FACTORY(                           \
         krunner_##libname,                                \
diff --git a/widgets/lineedit.cpp b/widgets/lineedit.cpp
index 3c499a79c..0b4ad17a3 100644
--- a/widgets/lineedit.cpp
+++ b/widgets/lineedit.cpp
@@ -26,7 +26,9 @@
 #include <kdebug.h>
 
 #include "lineedit.h"
-#include "lineedit.moc"
+
+namespace Plasma
+{
 
 class LineEdit::Private
 {
@@ -125,7 +127,6 @@ void LineEdit::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
 
     if(hasFocus() && d->m_cursorVisible)
         d->m_textLayout.drawCursor(painter, topLeft, d->m_cursorPos);
-        
 }
 
 void LineEdit::mousePressEvent(QGraphicsSceneMouseEvent *event)
@@ -244,3 +245,7 @@ QString LineEdit::getStringValue() const
     return d->m_text;
 }
 
+#include "lineedit.moc"
+
+} // Plasma namespace
+
diff --git a/widgets/lineedit.h b/widgets/lineedit.h
index 8fe8f3e77..b76a1acf0 100644
--- a/widgets/lineedit.h
+++ b/widgets/lineedit.h
@@ -29,6 +29,9 @@
 #include <applet.h>
 #include "widget.h"
 
+namespace Plasma
+{
+
 class KDE_EXPORT LineEdit : public QObject, public Widget
 {
   Q_OBJECT
@@ -59,4 +62,6 @@ class KDE_EXPORT LineEdit : public QObject, public Widget
     Private *const d;
 };
 
+} // Plasma namespace
+
 #endif
diff --git a/widgets/widget.cpp b/widgets/widget.cpp
index eedee99d7..60a2c9aea 100644
--- a/widgets/widget.cpp
+++ b/widgets/widget.cpp
@@ -18,6 +18,9 @@
 
 #include "widget.h"
 
+namespace Plasma
+{
+
 Widget::Widget(QGraphicsItem *parent, QRectF size)
   : QGraphicsItem(parent),
     m_boundingBox(size)
@@ -32,3 +35,6 @@ QRectF Widget::boundingRect() const
 {
   return m_boundingBox;
 }
+
+} // Plasma namespace
+
diff --git a/widgets/widget.h b/widgets/widget.h
index d9c50b79d..ad1156881 100644
--- a/widgets/widget.h
+++ b/widgets/widget.h
@@ -23,6 +23,9 @@
 
 #include <kdemacros.h>
 
+namespace Plasma
+{
+
 class KDE_EXPORT Widget : public QGraphicsItem
 {
     public:
@@ -35,4 +38,6 @@ class KDE_EXPORT Widget : public QGraphicsItem
         QRectF m_boundingBox;
 };
 
+} // Plasma namespace
+
 #endif