diff --git a/src/gui/painting/qrgb.h b/src/gui/painting/qrgb.h
index 834ebec5a9..d7a01840e8 100644
--- a/src/gui/painting/qrgb.h
+++ b/src/gui/painting/qrgb.h
@@ -49,7 +49,8 @@ QT_BEGIN_NAMESPACE
 
 typedef unsigned int QRgb;                        // RGB triplet
 
-const QRgb  RGB_MASK    = 0x00ffffff;                // masks RGB values
+// non-namespaced Qt global variable
+const Q_DECL_UNUSED QRgb  RGB_MASK    = 0x00ffffff;     // masks RGB values
 
 inline int qRed(QRgb rgb)                // get red part of RGB
 { return ((rgb >> 16) & 0xff); }
diff --git a/src/widgets/kernel/qlayoutitem.h b/src/widgets/kernel/qlayoutitem.h
index 3dfd5b0eb2..808cc9ff5d 100644
--- a/src/widgets/kernel/qlayoutitem.h
+++ b/src/widgets/kernel/qlayoutitem.h
@@ -50,7 +50,7 @@
 QT_BEGIN_NAMESPACE
 
 
-static const int QLAYOUTSIZE_MAX = INT_MAX/256/16;
+static const Q_DECL_UNUSED int QLAYOUTSIZE_MAX = INT_MAX/256/16;
 
 class QLayout;
 class QLayoutItem;