diff --git a/test/mem_fn_eq_test.cpp b/test/mem_fn_eq_test.cpp
index 53974bb..eb42ea9 100644
--- a/test/mem_fn_eq_test.cpp
+++ b/test/mem_fn_eq_test.cpp
@@ -20,7 +20,7 @@
 #include <boost/mem_fn.hpp>
 #include <boost/core/lightweight_test.hpp>
 
-#if defined(__clang__)
+#if defined(BOOST_CLANG_VERSION) && BOOST_CLANG_VERSION >= 130000
 # pragma clang diagnostic ignored "-Wunused-but-set-variable"
 #endif