diff --git a/files/gitlab-cookbooks/package/libraries/deprecations.rb b/files/gitlab-cookbooks/package/libraries/deprecations.rb
index e2558c421828166395054c65824a6957ba5fc171_ZmlsZXMvZ2l0bGFiLWNvb2tib29rcy9wYWNrYWdlL2xpYnJhcmllcy9kZXByZWNhdGlvbnMucmI=..c9a9df33c4c16d4440f22c642c12afc6a328438d_ZmlsZXMvZ2l0bGFiLWNvb2tib29rcy9wYWNrYWdlL2xpYnJhcmllcy9kZXByZWNhdGlvbnMucmI= 100644
--- a/files/gitlab-cookbooks/package/libraries/deprecations.rb
+++ b/files/gitlab-cookbooks/package/libraries/deprecations.rb
@@ -355,6 +355,12 @@
             deprecation: '16.9',
             removal: '17.0',
             note: "Starting with GitLab 17.0, `sidekiq['max_concurrency']` will be removed. Please follow https://docs.gitlab.com/ee/administration/sidekiq/extra_sidekiq_processes.html#manage-thread-counts-explicitly to use `sidekiq['concurrency']` instead."
+          },
+          {
+            config_keys: %w(gitlab omnibus_gitconfig),
+            deprecation: '16.10',
+            removal: '17.0',
+            note: "`omnibus_gitconfig` will be removed in GitLab 17.0. For details and migration instructions, please see: https://docs.gitlab.com/ee/update/versions/gitlab_16_changes.html#gitlabomnibus_gitconfig-deprecation"
           }
         ]