diff --git a/unsupported/test/autodiff_scalar.cpp b/unsupported/test/autodiff_scalar.cpp
index 3a78d6b..9cf1128 100644
--- a/unsupported/test/autodiff_scalar.cpp
+++ b/unsupported/test/autodiff_scalar.cpp
@@ -81,8 +81,9 @@
   typedef std::numeric_limits<AD> A;
   typedef std::numeric_limits<Scalar> B;
 
-  bool res = std::is_base_of<B, A>::value;
-  VERIFY_IS_EQUAL(res, true);
+#if EIGEN_HAS_CXX11
+  VERIFY(bool(std::is_base_of<B, A>::value));
+#endif
 }
 
 void test_autodiff_scalar()