diff --git a/src/widgets/styles/qmacstyle_mac.mm b/src/widgets/styles/qmacstyle_mac.mm
index 46918a2d5f..84445bfce4 100644
--- a/src/widgets/styles/qmacstyle_mac.mm
+++ b/src/widgets/styles/qmacstyle_mac.mm
@@ -1034,6 +1034,8 @@ static QSize qt_aqua_get_known_size(QStyle::ContentsType ct, const QWidget *widg
 #if defined(QMAC_QAQUASTYLE_SIZE_CONSTRAIN) || defined(DEBUG_SIZE_CONSTRAINT)
 static QAquaWidgetSize qt_aqua_guess_size(const QWidget *widg, QSize large, QSize small, QSize mini)
 {
+    Q_UNUSED(widg);
+
     if (large == QSize(-1, -1)) {
         if (small != QSize(-1, -1))
             return QAquaSizeSmall;
@@ -1049,7 +1051,7 @@ static QAquaWidgetSize qt_aqua_guess_size(const QWidget *widg, QSize large, QSiz
     }
 
 #ifndef QT_NO_MAINWINDOW
-    if (qobject_cast<QDockWidget *>(widg->window()) || qEnvironmentVariableIsSet("QWIDGET_ALL_SMALL")) {
+    if (qEnvironmentVariableIsSet("QWIDGET_ALL_SMALL")) {
         //if (small.width() != -1 || small.height() != -1)
         return QAquaSizeSmall;
     } else if (qEnvironmentVariableIsSet("QWIDGET_ALL_MINI")) {