diff --git a/src/widgets/styles/qmacstyle_mac.mm b/src/widgets/styles/qmacstyle_mac.mm
index a8926e0ad0..53568f3c53 100644
--- a/src/widgets/styles/qmacstyle_mac.mm
+++ b/src/widgets/styles/qmacstyle_mac.mm
@@ -5827,12 +5827,6 @@ QRect QMacStyle::subControlRect(ComplexControl cc, const QStyleOptionComplex *op
             switch (sc) {
             case SC_ComboBoxEditField:{
                 ret = QMacStylePrivate::comboboxEditBounds(combo->rect, bdi);
-                    // hack to posistion the edit feld correctly for QDateTimeEdits
-                    // in calendarPopup mode.
-                    if (qobject_cast<const QDateTimeEdit *>(widget)) {
-                       ret.moveTop(ret.top() - 2);
-                       ret.setHeight(ret.height() +1);
-                    }
                 break; }
             case SC_ComboBoxArrow:{
                 ret = QMacStylePrivate::comboboxEditBounds(combo->rect, bdi);
diff --git a/src/widgets/widgets/qdatetimeedit.cpp b/src/widgets/widgets/qdatetimeedit.cpp
index 7a723c5f1f..770c954c2a 100644
--- a/src/widgets/widgets/qdatetimeedit.cpp
+++ b/src/widgets/widgets/qdatetimeedit.cpp
@@ -993,7 +993,7 @@ QSize QDateTimeEdit::sizeHint() const
 
         QSize hint(w, h);
 
-#ifdef Q_WS_MAC
+#ifdef Q_OS_MAC
         if (d->calendarPopupEnabled()) {
             QStyleOptionComboBox opt;
             d->cachedSizeHint = style()->sizeFromContents(QStyle::CT_ComboBox, &opt, hint, this);