diff --git a/cpp/ql/lib/change-notes/2026-01-02-constant-folding.md b/cpp/ql/lib/change-notes/2026-01-02-constant-folding.md
new file mode 100644
index 00000000000..8ac0f91b939
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+++ b/cpp/ql/lib/change-notes/2026-01-02-constant-folding.md
@@ -0,0 +1,4 @@
+---
+category: minorAnalysis
+---
+* Some constants will now be represented by their unfolded expression trees. The `isConstant` predicate of `Expr` will no longer yield a result for those constants.
diff --git a/cpp/ql/src/change-notes/2026-01-02-constant-comparison.md b/cpp/ql/src/change-notes/2026-01-02-constant-comparison.md
new file mode 100644
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+++ b/cpp/ql/src/change-notes/2026-01-02-constant-comparison.md
@@ -0,0 +1,4 @@
+---
+category: minorAnalysis
+---
+* The `cpp/constant-comparison` query has been updated to not produce false positives for constants that are now represented by their unfolded expression trees.