diff --git a/src/plugins/styles/mac/qmacstyle_mac.mm b/src/plugins/styles/mac/qmacstyle_mac.mm
index 849d0f3589..aee2871917 100644
--- a/src/plugins/styles/mac/qmacstyle_mac.mm
+++ b/src/plugins/styles/mac/qmacstyle_mac.mm
@@ -1993,7 +1993,7 @@ NSCell *QMacStylePrivate::cocoaCell(CocoaControl widget) const
     return cell;
 }
 
-void QMacStylePrivate::drawNSViewInRect(CocoaControl widget, NSView *view, const QRect &qtRect, QPainter *p, bool isQWidget, DrawRectBlock drawRectBlock) const
+void QMacStylePrivate::drawNSViewInRect(CocoaControl widget, NSView *view, const QRect &qtRect, QPainter *p, bool isQWidget, __attribute__((noescape)) DrawRectBlock drawRectBlock) const
 {
     QPoint offset;
     if (widget == CocoaControl(Button_PopupButton, QStyleHelper::SizeSmall))
diff --git a/src/plugins/styles/mac/qmacstyle_mac_p_p.h b/src/plugins/styles/mac/qmacstyle_mac_p_p.h
index 57c22cfd8e..e244cd0ff1 100644
--- a/src/plugins/styles/mac/qmacstyle_mac_p_p.h
+++ b/src/plugins/styles/mac/qmacstyle_mac_p_p.h
@@ -267,7 +267,7 @@ public:
 
     void setupVerticalInvertedXform(CGContextRef cg, bool reverse, bool vertical, const CGRect &rect) const;
 
-    void drawNSViewInRect(CocoaControl widget, NSView *view, const QRect &rect, QPainter *p, bool isQWidget = true, DrawRectBlock drawRectBlock = nil) const;
+    void drawNSViewInRect(CocoaControl widget, NSView *view, const QRect &rect, QPainter *p, bool isQWidget = true, __attribute__((noescape)) DrawRectBlock drawRectBlock = nil) const;
     void resolveCurrentNSView(QWindow *window) const;
 
     void drawFocusRing(QPainter *p, const QRect &targetRect, int hMargin, int vMargin, qreal radius = 0) const;