diff --git a/gdk/gdkdisplay.c b/gdk/gdkdisplay.c
index 1cec8bba0d..44dc9d4c91 100644
--- a/gdk/gdkdisplay.c
+++ b/gdk/gdkdisplay.c
@@ -1424,6 +1424,8 @@ gdk_display_get_name (GdkDisplay *display)
  * Returns: number of screens.
  *
  * Since: 2.2
+ *
+ * Deprecated: 3.10: The number of screens is always 1.
  */
 gint
 gdk_display_get_n_screens (GdkDisplay *display)
diff --git a/gdk/gdkdisplay.h b/gdk/gdkdisplay.h
index c0566e7c55..e380028e49 100644
--- a/gdk/gdkdisplay.h
+++ b/gdk/gdkdisplay.h
@@ -45,6 +45,7 @@ GdkDisplay *gdk_display_open                (const gchar *display_name);
 
 const gchar * gdk_display_get_name         (GdkDisplay *display);
 
+GDK_DEPRECATED_IN_3_10
 gint        gdk_display_get_n_screens      (GdkDisplay  *display);
 GdkScreen * gdk_display_get_screen         (GdkDisplay  *display,
                                             gint         screen_num);