diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0c19f8792b17a0332b0967710a50f8a92db5c7fb..607fdf3d9218bbec8a0d23bd0c8950d49eb250c8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,6 +31,8 @@ Coq 8.11 is no longer supported in this version of Iris.
   `Dist`, `Op`, `Valid`, `ValidN`, `Unit`, `PCore` now use an `Hint Extern`
   based on `refine` instead of `apply`, in order to use Coq's newer unification
   algorithm.
+* Set `Hint Mode` for the classes `OfeDiscrete`, `Unit`, `CmraMorphism`,
+  `rFunctorContractive`, `urFunctorContractive`.
 
 **Changes in `bi`:**