diff --git a/doc/classes/SurfaceTool.xml b/doc/classes/SurfaceTool.xml
index 494f41422f..5562342eac 100644
--- a/doc/classes/SurfaceTool.xml
+++ b/doc/classes/SurfaceTool.xml
@@ -119,7 +119,7 @@
 				Removes the index array by expanding the vertex array.
 			</description>
 		</method>
-		<method name="generate_lod">
+		<method name="generate_lod" is_deprecated="true">
 			<return type="PackedInt32Array" />
 			<param index="0" name="nd_threshold" type="float" />
 			<param index="1" name="target_index_count" type="int" default="3" />