diff --git a/test/sparse_product.cpp b/test/sparse_product.cpp
index 40b81ffb4..7f77bb742 100644
--- a/test/sparse_product.cpp
+++ b/test/sparse_product.cpp
@@ -7,7 +7,7 @@
 // Public License v. 2.0. If a copy of the MPL was not distributed
 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-#if EIGEN_COMP_MSVC==1800
+#if defined(_MSC_VER) && (_MSC_VER==1800)
 // This unit test takes forever to compile in Release mode with MSVC 2013,
 // multiple hours. So let's switch off optimization for this one.
 #pragma optimize("",off)