diff --git a/pkgs/applications/editors/emacs-modes/elpa-packages.nix b/pkgs/applications/editors/emacs-modes/elpa-packages.nix
index 475e62579fb..e88206fc8b7 100644
--- a/pkgs/applications/editors/emacs-modes/elpa-packages.nix
+++ b/pkgs/applications/editors/emacs-modes/elpa-packages.nix
@@ -64,6 +64,7 @@ self:
     };
 
     elpaPackages = super // {
+      # These packages require emacs-25
       el-search = markBroken super.el-search;
       iterators = markBroken super.iterators;
       midi-kbd = markBroken super.midi-kbd;