diff --git a/src/plugins/platforms/windows/qwindowstheme.cpp b/src/plugins/platforms/windows/qwindowstheme.cpp
index 07485cc795..b1338566e9 100644
--- a/src/plugins/platforms/windows/qwindowstheme.cpp
+++ b/src/plugins/platforms/windows/qwindowstheme.cpp
@@ -22,7 +22,6 @@
 #include <QtCore/qvariant.h>
 #include <QtCore/qcoreapplication.h>
 #include <QtCore/qdebug.h>
-#include <QtCore/qtextstream.h>
 #include <QtCore/qsysinfo.h>
 #include <QtCore/qcache.h>
 #include <QtCore/qthread.h>
@@ -68,17 +67,6 @@ static inline QColor COLORREFToQColor(COLORREF cr)
     return QColor(GetRValue(cr), GetGValue(cr), GetBValue(cr));
 }
 
-static inline QTextStream& operator<<(QTextStream &str, const QColor &c)
-{
-    str.setIntegerBase(16);
-    str.setFieldWidth(2);
-    str.setPadChar(u'0');
-    str << " rgb: #" << c.red()  << c.green() << c.blue();
-    str.setIntegerBase(10);
-    str.setFieldWidth(0);
-    return str;
-}
-
 static inline bool booleanSystemParametersInfo(UINT what, bool defaultValue)
 {
     BOOL result;