diff --git a/src/gui/text/qfontmetrics.cpp b/src/gui/text/qfontmetrics.cpp
index edb3bb236..2ecc4950a 100644
--- a/src/gui/text/qfontmetrics.cpp
+++ b/src/gui/text/qfontmetrics.cpp
@@ -146,7 +146,7 @@ QFontMetrics::QFontMetrics(const QFont &font, QPaintDevice *paintdevice)
     int dpi = paintdevice ? paintdevice->logicalDpiY() : QX11Info::appDpiY();
 #ifdef Q_WS_X11
     const QX11Info *info = qt_x11Info(paintdevice);
-    int screen = info ? info->screen() : 0;
+    const int screen = info ? info->screen() : 0;
 #else
     const int screen = 0;
 #endif