diff --git a/CHANGES b/CHANGES
index 948ea84979..ed864de051 100644
--- a/CHANGES
+++ b/CHANGES
@@ -31,6 +31,7 @@ Bugs fixed
 * #7301: capital characters are not allowed for node_id
 * #7301: epub: duplicated node_ids are generated
 * #6564: html: a width of table was ignored on HTML builder
+* #7401: Incorrect argument is passed for :event:`env-get-outdated` handlers
 * #7355: autodoc: a signature of cython-function is not recognized well
 
 Testing
diff --git a/sphinx/builders/__init__.py b/sphinx/builders/__init__.py
index c596df3c59..93c246c69b 100644
--- a/sphinx/builders/__init__.py
+++ b/sphinx/builders/__init__.py
@@ -379,7 +379,7 @@ def read(self) -> List[str]:
         added, changed, removed = self.env.get_outdated_files(updated)
 
         # allow user intervention as well
-        for docs in self.events.emit('env-get-outdated', self, added, changed, removed):
+        for docs in self.events.emit('env-get-outdated', self.env, added, changed, removed):
             changed.update(set(docs) & self.env.found_docs)
 
         # if files were added or removed, all documents with globbed toctrees