diff --git a/Utilities/KWIML/test/test_include_CXX.cxx b/Utilities/KWIML/test/test_include_CXX.cxx
index 057b7c21c..111311a84 100644
--- a/Utilities/KWIML/test/test_include_CXX.cxx
+++ b/Utilities/KWIML/test/test_include_CXX.cxx
@@ -11,6 +11,12 @@
 ============================================================================*/
 #include <string>
 
+#if defined(_MSC_VER) && defined(NDEBUG)
+// Use C++ runtime to avoid linker warning:
+//  warning LNK4089: all references to 'MSVCP71.dll' discarded by /OPT:REF
+std::string test_include_CXX_use_stl_string;
+#endif
+
 /* Test KWIML header inclusion after above system headers.  */
 #include "test.h"
 #include KWIML_HEADER(ABI.h)