diff --git a/doc/classes/Viewport.xml b/doc/classes/Viewport.xml
index fc061cca61d..65586629e7e 100644
--- a/doc/classes/Viewport.xml
+++ b/doc/classes/Viewport.xml
@@ -243,7 +243,7 @@
 			The multisample anti-aliasing mode. A higher number results in smoother edges at the cost of significantly worse performance. A value of 4 is best unless targeting very high-end systems.
 		</member>
 		<member name="own_world" type="bool" setter="set_use_own_world" getter="is_using_own_world" default="false">
-			If [code]true[/code], the viewport will use [World] defined in [code]world[/code] property.
+			If [code]true[/code], the viewport will use a unique copy of the [World] defined in [member world].
 		</member>
 		<member name="physics_object_picking" type="bool" setter="set_physics_object_picking" getter="get_physics_object_picking" default="false">
 			If [code]true[/code], the objects rendered by viewport become subjects of mouse picking process.
diff --git a/scene/main/viewport.cpp b/scene/main/viewport.cpp
index 89e4128699c..1ec1e869413 100644
--- a/scene/main/viewport.cpp
+++ b/scene/main/viewport.cpp
@@ -2895,8 +2895,8 @@ void Viewport::unhandled_input(const Ref<InputEvent> &p_event) {
 	}
 }
 
-void Viewport::set_use_own_world(bool p_world) {
-	if (p_world == own_world.is_valid()) {
+void Viewport::set_use_own_world(bool p_use_own_world) {
+	if (p_use_own_world == own_world.is_valid()) {
 		return;
 	}
 
@@ -2904,18 +2904,18 @@ void Viewport::set_use_own_world(bool p_world) {
 		_propagate_exit_world(this);
 	}
 
-	if (!p_world) {
-		own_world = Ref<World>();
-		if (world.is_valid()) {
-			world->disconnect(CoreStringNames::get_singleton()->changed, this, "_own_world_changed");
-		}
-	} else {
+	if (p_use_own_world) {
 		if (world.is_valid()) {
 			own_world = world->duplicate();
 			world->connect(CoreStringNames::get_singleton()->changed, this, "_own_world_changed");
 		} else {
 			own_world = Ref<World>(memnew(World));
 		}
+	} else {
+		own_world = Ref<World>();
+		if (world.is_valid()) {
+			world->disconnect(CoreStringNames::get_singleton()->changed, this, "_own_world_changed");
+		}
 	}
 
 	if (is_inside_tree()) {
diff --git a/scene/main/viewport.h b/scene/main/viewport.h
index a4d22805981..8d1de3dfa80 100644
--- a/scene/main/viewport.h
+++ b/scene/main/viewport.h
@@ -527,7 +527,7 @@ public:
 	Vector2 get_camera_coords(const Vector2 &p_viewport_coords) const;
 	Vector2 get_camera_rect_size() const;
 
-	void set_use_own_world(bool p_world);
+	void set_use_own_world(bool p_use_own_world);
 	bool is_using_own_world() const;
 
 	void input(const Ref<InputEvent> &p_event);