diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index 143293b589..7b7600fdc3 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -10915,9 +10915,9 @@ void QWidget::setAttribute(Qt::WidgetAttribute attribute, bool on)
         return;
 
     Q_D(QWidget);
-    Q_ASSERT_X(sizeof(d->high_attributes)*8 >= (Qt::WA_AttributeCount - sizeof(uint)*8),
-               "QWidget::setAttribute(WidgetAttribute, bool)",
-               "QWidgetPrivate::high_attributes[] too small to contain all attributes in WidgetAttribute");
+    Q_STATIC_ASSERT_X(sizeof(d->high_attributes)*8 >= (Qt::WA_AttributeCount - sizeof(uint)*8),
+                      "QWidget::setAttribute(WidgetAttribute, bool): "
+                      "QWidgetPrivate::high_attributes[] too small to contain all attributes in WidgetAttribute");
 #ifdef Q_OS_WIN
     // ### Don't use PaintOnScreen+paintEngine() to do native painting in some future release
     if (attribute == Qt::WA_PaintOnScreen && on && windowType() != Qt::Desktop && !inherits("QGLWidget")) {