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diff --git a/docs/users_guide/8.10.1-notes.rst b/docs/users_guide/8.10.1-notes.rst
index 7566f3f019..1dea59a063 100644
--- a/docs/users_guide/8.10.1-notes.rst
+++ b/docs/users_guide/8.10.1-notes.rst
@@ -144,6 +144,9 @@ Compiler
the sample start event contains a timestamp of when the census occurred.
The retainer profiling events are emitted using the standard events.
+- The eventlog now logs the cost centre stack on each sample. This enables
+ the `.prof` file to be partially reconstructed from the eventlog.
+
- Add new flag :ghc-flag:`-fkeep-going` which makes the compiler
continue as far as it can despite errors.