diff --git a/databases/mysql80-server/files/patch-router_src_harness_include_mysql_harness_stdx_expected.h b/databases/mysql80-server/files/patch-router_src_harness_include_mysql_harness_stdx_expected.h
new file mode 100644
index 000000000000..5dc97a85bb45
--- /dev/null
+++ b/databases/mysql80-server/files/patch-router_src_harness_include_mysql_harness_stdx_expected.h
@@ -0,0 +1,29 @@
+--- router/src/harness/include/mysql/harness/stdx/expected.h.orig	2025-09-24 11:00:44 UTC
++++ router/src/harness/include/mysql/harness/stdx/expected.h
+@@ -55,26 +55,6 @@
+   };
+ #endif
+ 
+-/* workaround default-constructor of std::unique_ptr<T, D> triggering a
+- * static-exception when it is tested for "std::is_default_constructible"
+- *
+- * The problem exists in GCC's libstdc++ up to 7.0.0 and is tracked by C++ std
+- * as DR 2801
+- *
+- *   http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#2801
+- *
+- * It is fixed in GCC-7.1.0 and later:
+- *
+- * https://gcc.gnu.org/legacy-ml/gcc-cvs/2017-01/msg00068.html
+- */
+-
+-#include <memory>
+-namespace std {
+-template <class T>
+-struct is_default_constructible<std::unique_ptr<T, void (*)(T *)>>
+-    : std::false_type {};
+-}  // namespace std
+-
+ namespace stdx {
+ 
+ // inplace construction of unexpected values.