diff --git a/docs/api/en/core/BufferGeometry.html b/docs/api/en/core/BufferGeometry.html
index b4ff4e2ce6081b..43630ef3bf4acb 100644
--- a/docs/api/en/core/BufferGeometry.html
+++ b/docs/api/en/core/BufferGeometry.html
@@ -191,6 +191,7 @@ <h3>[property:Object userData]</h3>
 		<p>
 			An object that can be used to store custom data about the BufferGeometry.
 			It should not hold references to functions as these will not be cloned.
+			Default is an empty object `{}`.
 		</p>
 
 		<h3>[property:String uuid]</h3>
diff --git a/docs/api/en/core/Object3D.html b/docs/api/en/core/Object3D.html
index 399f53964bf3bd..eb3d8503abab09 100644
--- a/docs/api/en/core/Object3D.html
+++ b/docs/api/en/core/Object3D.html
@@ -206,6 +206,7 @@ <h3>[property:Object userData]</h3>
 		<p>
 			An object that can be used to store custom data about the Object3D. It
 			should not hold references to functions as these will not be cloned.
+			Default is an empty object `{}`.
 		</p>
 
 		<h3>[property:String uuid]</h3>
diff --git a/docs/api/en/materials/Material.html b/docs/api/en/materials/Material.html
index 9c045b98ab8656..d84429199c852b 100644
--- a/docs/api/en/materials/Material.html
+++ b/docs/api/en/materials/Material.html
@@ -369,6 +369,7 @@ <h3>[property:Object userData]</h3>
 		<p>
 			An object that can be used to store custom data about the Material. It
 			should not hold references to functions as these will not be cloned.
+			Default is an empty object `{}`.
 		</p>
 
 		<h2>Methods</h2>
diff --git a/docs/api/en/textures/Texture.html b/docs/api/en/textures/Texture.html
index 1b0971a6bef6d1..f607111122ff10 100644
--- a/docs/api/en/textures/Texture.html
+++ b/docs/api/en/textures/Texture.html
@@ -281,6 +281,7 @@ <h3>[property:Object userData]</h3>
 		<p>
 			An object that can be used to store custom data about the texture. It
 			should not hold references to functions as these will not be cloned.
+			Default is an empty object `{}`.
 		</p>
 
 		<h3>[property:Source source]</h3>