diff --git a/docs/dev/clang-tidy-fixes-2026-04.md b/docs/dev/clang-tidy-fixes-2026-04.md
index a5d11079c..e7c7ada24 100644
--- a/docs/dev/clang-tidy-fixes-2026-04.md
+++ b/docs/dev/clang-tidy-fixes-2026-04.md
@@ -104,7 +104,8 @@
   - [PR #745](https://github.com/Framework-R-D/phlex/pull/745)
 - [x] [modernize-avoid-c-style-cast](https://clang.llvm.org/extra/clang-tidy/checks/modernize/avoid-c-style-cast.html) (82)
   - [PR #771](https://github.com/Framework-R-D/phlex/pull/771)
-- [ ] [modernize-concat-nested-namespaces](https://clang.llvm.org/extra/clang-tidy/checks/modernize/concat-nested-namespaces.html) (1)
+- [x] [modernize-concat-nested-namespaces](https://clang.llvm.org/extra/clang-tidy/checks/modernize/concat-nested-namespaces.html) (1)
+  - [PR #816](https://github.com/Framework-R-D/phlex/pull/816)
 - [x] [modernize-make-shared](https://clang.llvm.org/extra/clang-tidy/checks/modernize/make-shared.html) (1)
   - [PR #746](https://github.com/Framework-R-D/phlex/pull/746)
 - [x] [modernize-pass-by-value](https://clang.llvm.org/extra/clang-tidy/checks/modernize/pass-by-value.html) (13)