diff --git a/changelog.rst b/changelog.rst
index 2cf569aa668..64d94ce674c 100644
--- a/changelog.rst
+++ b/changelog.rst
@@ -1,5 +1,9 @@
 .. index::
     single: CHANGELOG
+    
+.. !! CAUTION !!
+   This file is automatically generated each month. Do not add new changelog
+   items when preparing a pull requests.
 
 The Documentation Changelog
 ===========================