diff --git a/test/is_function_test.cpp b/test/is_function_test.cpp
index 5cfedda..80899db 100644
--- a/test/is_function_test.cpp
+++ b/test/is_function_test.cpp
@@ -16,7 +16,7 @@
 #pragma GCC diagnostic ignored "-Wnoexcept-type"
 #endif
 
-#ifdef BOOST_TT_HAS_ACCURATE_BINARY_OPERATOR_DETECTION
+#ifdef BOOST_TT_HAS_ASCCURATE_IS_FUNCTION
 
 struct X
 {