diff --git a/libcxx/test/std/containers/sequences/vector/vector.cons/construct_iter_iter.pass.cpp b/libcxx/test/std/containers/sequences/vector/vector.cons/construct_iter_iter.pass.cpp
index 2b3b212aecde0..3b43a89fa457b 100644
--- a/libcxx/test/std/containers/sequences/vector/vector.cons/construct_iter_iter.pass.cpp
+++ b/libcxx/test/std/containers/sequences/vector/vector.cons/construct_iter_iter.pass.cpp
@@ -180,7 +180,7 @@ void test_ctor_with_different_value_type() {
     // Though the types are different, initialization can be done with `memcpy`.
     int32_t array[1] = { -1 };
     std::vector<uint32_t> v(array, array + 1);
-    assert(v[0] == 4294967295);
+    assert(v[0] == 4294967295U);
   }
 }