diff --git a/gdk/wayland/gdkdisplay-wayland.h b/gdk/wayland/gdkdisplay-wayland.h
index aa5797a331..0ec674eba7 100644
--- a/gdk/wayland/gdkdisplay-wayland.h
+++ b/gdk/wayland/gdkdisplay-wayland.h
@@ -50,7 +50,7 @@
 
 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