diff --git a/gdk/quartz/gdkwindow-quartz.c b/gdk/quartz/gdkwindow-quartz.c
index a9d4713163..0c8a19c476 100644
--- a/gdk/quartz/gdkwindow-quartz.c
+++ b/gdk/quartz/gdkwindow-quartz.c
@@ -2649,13 +2649,11 @@ gdk_window_set_decorations (GdkWindow       *window,
        * recreating the toplevel. There might be bad side-effects of doing
        * that, but it seems alright.
        */
-#if MAC_OS_X_VERSION_MIN_ALLOWED > MAC_OS_X_VERSION_10_5
       if ([impl->toplevel respondsToSelector:@selector(setStyleMask:)])
         {
           [impl->toplevel setStyleMask:new_mask];
         }
       else
-#endif
         {
           [impl->toplevel release];
           impl->toplevel = [[GdkQuartzWindow alloc] initWithContentRect:rect