diff --git a/pkgs/development/python-modules/affinegap/default.nix b/pkgs/development/python-modules/affinegap/default.nix
index 994e32f831c2..914acba0604c 100644
--- a/pkgs/development/python-modules/affinegap/default.nix
+++ b/pkgs/development/python-modules/affinegap/default.nix
@@ -41,6 +41,7 @@ buildPythonPackage rec {
     "affinegap"
   ];
 
+  # Bulk updater will see an older tag ending with a "2" and switch to it
   passthru.skipBulkUpdate = true;
 
   meta = {