diff --git a/doc/classes/Vector2.xml b/doc/classes/Vector2.xml
index eeef694b983..8b48bd4c884 100644
--- a/doc/classes/Vector2.xml
+++ b/doc/classes/Vector2.xml
@@ -288,6 +288,7 @@
 			<return type="Vector2" />
 			<description>
 				Returns the result of scaling the vector to unit length. Equivalent to [code]v / v.length()[/code]. See also [method is_normalized].
+				[b]Note:[/b] This function may return incorrect values if the initial vector length is near zero.
 			</description>
 		</method>
 		<method name="orthogonal" qualifiers="const">
diff --git a/doc/classes/Vector3.xml b/doc/classes/Vector3.xml
index 8fd38a24159..91553c3acdc 100644
--- a/doc/classes/Vector3.xml
+++ b/doc/classes/Vector3.xml
@@ -256,6 +256,7 @@
 			<return type="Vector3" />
 			<description>
 				Returns the result of scaling the vector to unit length. Equivalent to [code]v / v.length()[/code]. See also [method is_normalized].
+				[b]Note:[/b] This function may return incorrect values if the input vector length is near zero.
 			</description>
 		</method>
 		<method name="octahedron_decode" qualifiers="static">
diff --git a/doc/classes/Vector4.xml b/doc/classes/Vector4.xml
index 3b5b2e918e9..880e6e4e19d 100644
--- a/doc/classes/Vector4.xml
+++ b/doc/classes/Vector4.xml
@@ -191,6 +191,7 @@
 			<return type="Vector4" />
 			<description>
 				Returns the result of scaling the vector to unit length. Equivalent to [code]v / v.length()[/code]. See also [method is_normalized].
+				[b]Note:[/b] This function may return incorrect values if the input vector length is near zero.
 			</description>
 		</method>
 		<method name="posmod" qualifiers="const">