diff --git a/test/unordered/unnecessary_copy_tests.cpp b/test/unordered/unnecessary_copy_tests.cpp
index 6e9961cc..29ca4282 100644
--- a/test/unordered/unnecessary_copy_tests.cpp
+++ b/test/unordered/unnecessary_copy_tests.cpp
@@ -245,7 +245,8 @@ namespace unnecessary_copy_tests
         // the existing element.
         reset();
         x.emplace();
-#if !defined(BOOST_NO_VARIADIC_TEMPLATES)
+#if !defined(BOOST_NO_VARIADIC_TEMPLATES) || \
+    !defined(BOOST_NO_RVALUE_REFERENCES)
         // source_cost doesn't make much sense here, but it seems to fit.
         COPY_COUNT(1); MOVE_COUNT(source_cost);
 #else