diff --git a/libcxx/include/vector b/libcxx/include/vector
index ce7df7a9f0420..c3e3f05671f8f 100644
--- a/libcxx/include/vector
+++ b/libcxx/include/vector
@@ -433,10 +433,12 @@ public:
   _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI
   vector(size_type __n, const value_type& __x, const allocator_type& __a)
       : __end_cap_(nullptr, __a) {
+    auto __guard = std::__make_exception_guard(__destroy_vector(*this));
     if (__n > 0) {
       __vallocate(__n);
       __construct_at_end(__n, __x);
     }
+    __guard.__complete();
   }
 
   template <class _InputIterator,