diff --git a/include/continuable/detail/core/base.hpp b/include/continuable/detail/core/base.hpp
index 32b8c5d..d19729d 100644
--- a/include/continuable/detail/core/base.hpp
+++ b/include/continuable/detail/core/base.hpp
@@ -746,7 +746,8 @@ struct final_callback : util::non_copyable {
       try {
         std::rethrow_exception(exception);
       } catch (std::exception const& unhandled) {
-        (void)unhandled;
+        char const* const what = unhandled.what();
+        (void)what;
         CTI_DETAIL_TRAP();
       } catch (...) {
         CTI_DETAIL_TRAP();