diff --git a/CHANGELOG b/CHANGELOG
index 0a0b879ce..05c5f44d9 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+2020-10-25
+- The option environment.variables.SHELL is no longer set automatically when,
+  eg. programs.zsh.enable is configured.
+
 2020-09-12
 - Options using the deprecated loaOf where removed, see https://github.com/NixOS/nixpkgs/pull/96042