1 files changed, 7 insertions, 1 deletions
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.cat/floating_point.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.cat/floating_point.pass.cpp
index 28664496031..207d9e56f8d 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.cat/floating_point.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.cat/floating_point.pass.cpp
@@ -12,12 +12,13 @@
 // floating_point
 
 #include <type_traits>
+#include "test_macros.h"
 
 template <class T>
 void test_floating_point_imp()
 {
     static_assert(!std::is_void<T>::value, "");
-#if _LIBCPP_STD_VER > 11
+#if TEST_STD_VER > 11
     static_assert(!std::is_null_pointer<T>::value, "");
 #endif
     static_assert(!std::is_integral<T>::value, "");
@@ -43,9 +44,14 @@ void test_floating_point()
     test_floating_point_imp<const volatile T>();
 }
 
+struct incomplete_type;
+
 int main()
 {
     test_floating_point<float>();
     test_floating_point<double>();
     test_floating_point<long double>();
+
+//  LWG#2581
+    static_assert(!std::is_floating_point<incomplete_type>::value, "");
 }