diff --git a/gdk/wayland/gdkprivate-wayland.h b/gdk/wayland/gdkprivate-wayland.h
index 8fba6b72b7..dabd22d6ae 100644
--- a/gdk/wayland/gdkprivate-wayland.h
+++ b/gdk/wayland/gdkprivate-wayland.h
@@ -40,6 +40,8 @@
 
 #include "config.h"
 
+#define WL_SURFACE_HAS_BUFFER_SCALE 3
+
 #define GDK_WINDOW_IS_WAYLAND(win)    (GDK_IS_WINDOW_IMPL_WAYLAND (((GdkWindow *)win)->impl))
 
 GdkKeymap *_gdk_wayland_keymap_new (void);
diff --git a/gdk/wayland/gdkwindow-wayland.c b/gdk/wayland/gdkwindow-wayland.c
index aa77641f67..b5f51e816b 100644
--- a/gdk/wayland/gdkwindow-wayland.c
+++ b/gdk/wayland/gdkwindow-wayland.c
@@ -37,8 +37,6 @@
 #include <string.h>
 #include <errno.h>
 
-#define WL_SURFACE_HAS_BUFFER_SCALE 3
-
 #define WINDOW_IS_TOPLEVEL_OR_FOREIGN(window) \
   (GDK_WINDOW_TYPE (window) != GDK_WINDOW_CHILD &&   \
    GDK_WINDOW_TYPE (window) != GDK_WINDOW_OFFSCREEN)