diff --git a/libs/tk/ydk/quartz/gdkscreen-quartz.c b/libs/tk/ydk/quartz/gdkscreen-quartz.c
index 796fcb5928..d5b9945b8c 100644
--- a/libs/tk/ydk/quartz/gdkscreen-quartz.c
+++ b/libs/tk/ydk/quartz/gdkscreen-quartz.c
@@ -88,8 +88,7 @@ _gdk_screen_quartz_init (GdkScreenQuartz *screen_quartz)
                                    gdk_screen_get_system_colormap (screen));
 
   nsscreen = [[NSScreen screens] objectAtIndex:0];
-  gdk_screen_set_resolution (screen,
-                             72.0 * [nsscreen userSpaceScaleFactor]);
+  gdk_screen_set_resolution (screen, 72.0 /* * [nsscreen userSpaceScaleFactor] */);
 
   gdk_screen_quartz_calculate_layout (screen_quartz);
 
@@ -362,7 +361,7 @@ get_mm_from_pixels (NSScreen *screen, int pixels)
    * and 25.4 is the number of millimeters per inch.
    */
 #if MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_3
-  float dpi = [screen userSpaceScaleFactor] * 72.0;
+  float dpi = /* [screen userSpaceScaleFactor] * */ 72.0;
 #else
   float dpi = 96.0 / 72.0;
 #endif