diff --git a/doc/classes/PhysicalBone3D.xml b/doc/classes/PhysicalBone3D.xml
index 60c5881b558..35952e24324 100644
--- a/doc/classes/PhysicalBone3D.xml
+++ b/doc/classes/PhysicalBone3D.xml
@@ -8,6 +8,7 @@
[b]Note:[/b] In order to detect physical bones with raycasts, the [member SkeletonModifier3D.active] property of the parent [PhysicalBoneSimulator3D] must be [code]true[/code] and the [Skeleton3D]'s bone must be assigned to [PhysicalBone3D] correctly; it means that [method get_bone_id] should return a valid id ([code]>= 0[/code]).
+ $DOCS_URL/tutorials/physics/ragdoll_system.html