diff --git a/libbreezecommon/breezeboxshadowrenderer.h b/libbreezecommon/breezeboxshadowrenderer.h
--- a/libbreezecommon/breezeboxshadowrenderer.h
+++ b/libbreezecommon/breezeboxshadowrenderer.h
@@ -22,6 +22,7 @@
 #include "breezecommon_export.h"
 
 // Qt
+#include <QColor>
 #include <QImage>
 #include <QPoint>
 #include <QSize>
diff --git a/libbreezecommon/breezeboxshadowrenderer.cpp b/libbreezecommon/breezeboxshadowrenderer.cpp
--- a/libbreezecommon/breezeboxshadowrenderer.cpp
+++ b/libbreezecommon/breezeboxshadowrenderer.cpp
@@ -26,7 +26,12 @@
 
 // Qt
 #include <QPainter>
+
+#ifdef BREEZE_COMMON_USE_KDE4
+#include <QtCore/qmath.h>
+#else
 #include <QtMath>
+#endif
 
 namespace Breeze
 {