diff --git a/examples/objc/AppRTCMobile/mac/APPRTCAppDelegate.m b/examples/objc/AppRTCMobile/mac/APPRTCAppDelegate.m
index 7ca63ecad6..36a470021d 100644
--- a/examples/objc/AppRTCMobile/mac/APPRTCAppDelegate.m
+++ b/examples/objc/AppRTCMobile/mac/APPRTCAppDelegate.m
@@ -30,7 +30,7 @@
                                  NSMidY(visibleRect),
                                  1320,
                                  1140);
-  NSUInteger styleMask = NSTitledWindowMask | NSClosableWindowMask;
+  NSUInteger styleMask = NSWindowStyleMaskTitled | NSWindowStyleMaskClosable;
   _window = [[NSWindow alloc] initWithContentRect:windowRect
                                         styleMask:styleMask
                                           backing:NSBackingStoreBuffered