diff --git a/terrain_instance_3d.gd b/terrain_instance_3d.gd
index 361ce96..712eed8 100644
--- a/terrain_instance_3d.gd
+++ b/terrain_instance_3d.gd
@@ -133,7 +133,7 @@ var normal_map_r: Texture2D = null:
 		return normal_map_r
 
 	set(value):
-		self._material.set_shader_parameter("ALBEDO_MAP_R", value)
+		self._material.set_shader_parameter("NORMAL_MAP_R", value)
 
 		normal_map_r = value