diff --git a/unittest/TriangleTest.cpp b/unittest/TriangleTest.cpp
index 91e4bda..28c9ee8 100644
--- a/unittest/TriangleTest.cpp
+++ b/unittest/TriangleTest.cpp
@@ -1,4 +1,4 @@
-#ifndef WIN32
+#if !defined(_WIN32) && !defined(BOOST_TEST_DYN_LINK)
 #define BOOST_TEST_DYN_LINK
 #endif
 #include <boost/test/unit_test.hpp>
diff --git a/unittest/main.cpp b/unittest/main.cpp
index 9246533..14ad9c3 100644
--- a/unittest/main.cpp
+++ b/unittest/main.cpp
@@ -1,4 +1,4 @@
-#ifndef WIN32
+#if !defined(_WIN32) && !defined(BOOST_TEST_DYN_LINK)
 #define BOOST_TEST_DYN_LINK
 #endif
 #define BOOST_TEST_MODULE Poly2triTest