diff --git a/changelog/unreleased/kong/perf-router-trad-compat-expression.yml b/changelog/unreleased/kong/perf-router-trad-compat-expression.yml
new file mode 100644
index 00000000000..02481a83a00
--- /dev/null
+++ b/changelog/unreleased/kong/perf-router-trad-compat-expression.yml
@@ -0,0 +1,3 @@
+message: "Improved performance of the traditional compatible router by optimizing the expression generation."
+type: performance
+scope: Core