diff --git a/CHANGES b/CHANGES
index d972aa21e..ada1a5190 100644
--- a/CHANGES
+++ b/CHANGES
@@ -18,6 +18,7 @@ Bugs fixed
 
 * #4085: Failed PDF build from image in parsed-literal using ``:align:`` option
 * #4100: Remove debug print from autodoc extension
+* #3987: Changing theme from alabaster causes HTML build to fail
 
 Testing
 --------