diff --git a/doc/classes/Node.xml b/doc/classes/Node.xml
index 2f7b349ba58..2a8762cb606 100644
--- a/doc/classes/Node.xml
+++ b/doc/classes/Node.xml
@@ -925,6 +925,9 @@
 		<constant name="NOTIFICATION_INTERNAL_PHYSICS_PROCESS" value="26">
 			Notification received every frame when the internal physics process flag is set (see [method set_physics_process_internal]).
 		</constant>
+		<constant name="NOTIFICATION_POST_ENTER_TREE" value="27">
+			Notification received when the node is ready, just before [constant NOTIFICATION_READY] is received. Unlike the latter, it's sent every time the node enters tree, instead of only once.
+		</constant>
 		<constant name="NOTIFICATION_WM_MOUSE_ENTER" value="1002">
 			Notification received from the OS when the mouse enters the game window.
 			Implemented on desktop and web platforms.
diff --git a/scene/main/node.cpp b/scene/main/node.cpp
index 81c7b382c7f..e95d8616d85 100644
--- a/scene/main/node.cpp
+++ b/scene/main/node.cpp
@@ -2873,6 +2873,7 @@ void Node::_bind_methods() {
 	BIND_CONSTANT(NOTIFICATION_PATH_CHANGED);
 	BIND_CONSTANT(NOTIFICATION_INTERNAL_PROCESS);
 	BIND_CONSTANT(NOTIFICATION_INTERNAL_PHYSICS_PROCESS);
+	BIND_CONSTANT(NOTIFICATION_POST_ENTER_TREE);
 
 	BIND_CONSTANT(NOTIFICATION_WM_MOUSE_ENTER);
 	BIND_CONSTANT(NOTIFICATION_WM_MOUSE_EXIT);