diff --git a/src/chartpresenter.cpp b/src/chartpresenter.cpp
index 4bcddac..673603b 100644
--- a/src/chartpresenter.cpp
+++ b/src/chartpresenter.cpp
@@ -18,7 +18,7 @@
 #include "linechartitem_p.h"
 #include "percentbarpresenter.h"
 #include "linechartanimationitem_p.h"
-#include "piepresenter.h"
+#include "piepresenter_p.h"
 #include "scatterpresenter_p.h"
 
 QTCOMMERCIALCHART_BEGIN_NAMESPACE
diff --git a/src/charttheme.cpp b/src/charttheme.cpp
index f9bc997..b0a5155 100644
--- a/src/charttheme.cpp
+++ b/src/charttheme.cpp
@@ -20,7 +20,7 @@
 #include "linechartitem_p.h"
 #include "percentbarpresenter.h"
 #include "scatterpresenter_p.h"
-#include "piepresenter.h"
+#include "piepresenter_p.h"
 
 //themes
 #include "chartthemevanilla_p.h"
diff --git a/src/piechart/piechart.pri b/src/piechart/piechart.pri
index d5018df..dbed0d8 100644
--- a/src/piechart/piechart.pri
+++ b/src/piechart/piechart.pri
@@ -9,9 +9,9 @@ SOURCES += \
     $$PWD/qpieslice.cpp
 
 PRIVATE_HEADERS += \
-    $$PWD/piepresenter.h \
-    $$PWD/pieslice.h \
-    $$PWD/pieslicelabel.h
+    $$PWD/piepresenter_p.h \
+    $$PWD/pieslice_p.h \
+    $$PWD/pieslicelabel_p.h
 
 PUBLIC_HEADERS += \
     $$PWD/qpieseries.h \
diff --git a/src/piechart/piepresenter.cpp b/src/piechart/piepresenter.cpp
index 9e5f4fd..8f3f244 100644
--- a/src/piechart/piepresenter.cpp
+++ b/src/piechart/piepresenter.cpp
@@ -1,8 +1,8 @@
 
-#include "piepresenter.h"
-#include "pieslice.h"
+#include "piepresenter_p.h"
+#include "pieslice_p.h"
 #include "qpieslice.h"
-#include "pieslicelabel.h"
+#include "pieslicelabel_p.h"
 #include "qpieseries.h"
 #include <qmath.h>
 #include <QDebug>
@@ -205,6 +205,6 @@ void PiePresenter::deleteSlice(QPieSlice* sliceData)
     delete m_slices.take(sliceData);
 }
 
-#include "moc_piepresenter.cpp"
+#include "moc_piepresenter_p.cpp"
 
 QTCOMMERCIALCHART_END_NAMESPACE
diff --git a/src/piechart/piepresenter.h b/src/piechart/piepresenter_p.h
similarity index 100%
rename from src/piechart/piepresenter.h
rename to src/piechart/piepresenter_p.h
diff --git a/src/piechart/pieslice.cpp b/src/piechart/pieslice.cpp
index 9893cfc..213feff 100644
--- a/src/piechart/pieslice.cpp
+++ b/src/piechart/pieslice.cpp
@@ -1,6 +1,6 @@
-#include "pieslice.h"
-#include "pieslicelabel.h"
-#include "piepresenter.h"
+#include "pieslice_p.h"
+#include "pieslicelabel_p.h"
+#include "piepresenter_p.h"
 #include "qpieseries.h"
 #include "qpieslice.h"
 #include <QPainter>
@@ -130,6 +130,6 @@ void PieSlice::updateData(const QPieSlice* sliceData)
     update();
 }
 
-#include "moc_pieslice.cpp"
+#include "moc_pieslice_p.cpp"
 
 QTCOMMERCIALCHART_END_NAMESPACE
diff --git a/src/piechart/pieslice.h b/src/piechart/pieslice_p.h
similarity index 100%
rename from src/piechart/pieslice.h
rename to src/piechart/pieslice_p.h
diff --git a/src/piechart/pieslicelabel.cpp b/src/piechart/pieslicelabel.cpp
index c6267be..697dd93 100644
--- a/src/piechart/pieslicelabel.cpp
+++ b/src/piechart/pieslicelabel.cpp
@@ -1,4 +1,4 @@
-#include "pieslicelabel.h"
+#include "pieslicelabel_p.h"
 #include <QPainter>
 #include <qmath.h>
 #include <QGraphicsTextItem>
diff --git a/src/piechart/pieslicelabel.h b/src/piechart/pieslicelabel_p.h
similarity index 100%
rename from src/piechart/pieslicelabel.h
rename to src/piechart/pieslicelabel_p.h
diff --git a/src/piechart/qpieseries.cpp b/src/piechart/qpieseries.cpp
index fe835e6..4fd2b39 100644
--- a/src/piechart/qpieseries.cpp
+++ b/src/piechart/qpieseries.cpp
@@ -1,8 +1,5 @@
 #include "qpieseries.h"
 #include "qpieslice.h"
-#include "piepresenter.h"
-#include "pieslice.h"
-#include <QFontMetrics>
 #include <QDebug>
 
 QTCOMMERCIALCHART_BEGIN_NAMESPACE