diff --git a/docs/source/release_notes.rst b/docs/source/release_notes.rst
index c4fecb075c..0169254ad1 100644
--- a/docs/source/release_notes.rst
+++ b/docs/source/release_notes.rst
@@ -3,6 +3,7 @@ Release Notes
 **Future Releases**
     * Enhancements
     * Fixes
+        * Fixed error when stacking data with no exogenous variables :pr:`4275`
     * Changes
     * Documentation Changes
     * Testing Changes