diff --git a/gdk/wayland/gdkdisplay-wayland.h b/gdk/wayland/gdkdisplay-wayland.h
index a6b2247600..1e4a9860f6 100644
--- a/gdk/wayland/gdkdisplay-wayland.h
+++ b/gdk/wayland/gdkdisplay-wayland.h
@@ -48,7 +48,7 @@
 
 G_BEGIN_DECLS
 
-#define GDK_WAYLAND_MAX_THEME_SCALE 3
+#define GDK_WAYLAND_MAX_THEME_SCALE 4
 #define GDK_WAYLAND_THEME_SCALES_COUNT GDK_WAYLAND_MAX_THEME_SCALE
 
 #define GDK_ZWP_POINTER_GESTURES_V1_VERSION 1