diff --git a/docs/dev/clang-tidy-fixes-2026-04.md b/docs/dev/clang-tidy-fixes-2026-04.md
index 78d1cb80c..d6dfaa5aa 100644
--- a/docs/dev/clang-tidy-fixes-2026-04.md
+++ b/docs/dev/clang-tidy-fixes-2026-04.md
@@ -118,7 +118,8 @@
 - [ ] [modernize-use-designated-initializers](https://clang.llvm.org/extra/clang-tidy/checks/modernize/use-designated-initializers.html) (69)
 - [x] [modernize-use-equals-default](https://clang.llvm.org/extra/clang-tidy/checks/modernize/use-equals-default.html) (7)
   - [PR #784](https://github.com/Framework-R-D/phlex/pull/784)
-- [ ] [modernize-use-integer-sign-comparison](https://clang.llvm.org/extra/clang-tidy/checks/modernize/use-integer-sign-comparison.html) (7)
+- [x] [modernize-use-integer-sign-comparison](https://clang.llvm.org/extra/clang-tidy/checks/modernize/use-integer-sign-comparison.html) (7)
+  - [PR #791](https://github.com/Framework-R-D/phlex/pull/791)
 - [x] [modernize-use-scoped-lock](https://clang.llvm.org/extra/clang-tidy/checks/modernize/use-scoped-lock.html) (6)
   - [PR #789](https://github.com/Framework-R-D/phlex/pull/789)
 - [x] [modernize-use-nullptr](https://clang.llvm.org/extra/clang-tidy/checks/modernize/use-nullptr.html) (194)
diff --git a/plugins/python/src/modulewrap.cpp b/plugins/python/src/modulewrap.cpp
index 2f1d4b946..4b6973576 100644
--- a/plugins/python/src/modulewrap.cpp
+++ b/plugins/python/src/modulewrap.cpp
@@ -557,6 +557,9 @@ namespace {
     }
 
     unsigned long ul = PyLong_AsUnsignedLong(pyobject);
+    // In this case, using 'std::cmp_equal(ul, -1)' returns the wrong result, so
+    // we suppress the clang-tidy warning re. 'ul == static_cast<unsigned long>(-1)'.
+    // NOLINTNEXTLINE(modernize-use-integer-sign-comparison)
     if (ul == static_cast<unsigned long>(-1) && PyErr_Occurred() && PyLong_Check(pyobject)) {
       PyErr_Clear();
       long i = PyLong_AS_LONG(pyobject);