diff --git a/changelog b/changelog
index a7bb67dd..83e48d47 100644
--- a/changelog
+++ b/changelog
@@ -8,6 +8,7 @@ Changes in version 0.12.0.0
    - Dropped compatibility with old GHCs to support this
  * Add `Eq1`, `Ord1`, `Show1`, and `Read1` `Vector` instances, and related
    helper functions.
+ * Relax context for `Unbox (Complex a)`.
 
 Changes in version 0.11.0.0