diff --git a/include/boost/type_traits/detail/config.hpp b/include/boost/type_traits/detail/config.hpp
index b10bce2..679ad08 100644
--- a/include/boost/type_traits/detail/config.hpp
+++ b/include/boost/type_traits/detail/config.hpp
@@ -83,7 +83,7 @@
 //
 #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && !BOOST_WORKAROUND(BOOST_GCC, < 40805)\
       && !BOOST_WORKAROUND(BOOST_MSVC, < 1900) && !BOOST_WORKAROUND(__clang_major__, <= 4)
-#  define BOOST_TT_HAS_ASCCURATE_IS_FUNCTION
+#  define BOOST_TT_HAS_ACCURATE_IS_FUNCTION
 #endif
 
 #if defined(_MSVC_LANG) && (_MSVC_LANG >= 201703) 
diff --git a/include/boost/type_traits/is_function.hpp b/include/boost/type_traits/is_function.hpp
index 8556235..1518f7b 100644
--- a/include/boost/type_traits/is_function.hpp
+++ b/include/boost/type_traits/is_function.hpp
@@ -14,7 +14,7 @@
 #include <boost/type_traits/detail/config.hpp>
 #include <boost/config/workaround.hpp>
 
-#ifdef BOOST_TT_HAS_ASCCURATE_IS_FUNCTION
+#ifdef BOOST_TT_HAS_ACCURATE_IS_FUNCTION
 
 #include <boost/type_traits/detail/is_function_cxx_11.hpp>
 
diff --git a/include/boost/type_traits/is_member_function_pointer.hpp b/include/boost/type_traits/is_member_function_pointer.hpp
index 9b5dbbf..dccd440 100644
--- a/include/boost/type_traits/is_member_function_pointer.hpp
+++ b/include/boost/type_traits/is_member_function_pointer.hpp
@@ -13,7 +13,7 @@
 
 #include <boost/type_traits/detail/config.hpp>
 
-#ifdef BOOST_TT_HAS_ASCCURATE_IS_FUNCTION
+#ifdef BOOST_TT_HAS_ACCURATE_IS_FUNCTION
 
 #include <boost/type_traits/detail/is_member_function_pointer_cxx_11.hpp>
 
diff --git a/test/is_function_test.cpp b/test/is_function_test.cpp
index 952ec6a..dc69071 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_ASCCURATE_IS_FUNCTION
+#ifdef BOOST_TT_HAS_ACCURATE_IS_FUNCTION
 
 struct X
 {
@@ -138,7 +138,7 @@ BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_function<vfoo4_t>::value, true);
 
 #endif
 
-#ifdef BOOST_TT_HAS_ASCCURATE_IS_FUNCTION
+#ifdef BOOST_TT_HAS_ACCURATE_IS_FUNCTION
 
 test_cv_qual(&X::f);
 test_cv_qual(&X::fc);
diff --git a/test/is_member_func_test.cpp b/test/is_member_func_test.cpp
index 7efa269..0095d6e 100644
--- a/test/is_member_func_test.cpp
+++ b/test/is_member_func_test.cpp
@@ -16,7 +16,7 @@
 #pragma GCC diagnostic ignored "-Wnoexcept-type"
 #endif
 
-#ifdef BOOST_TT_HAS_ASCCURATE_IS_FUNCTION
+#ifdef BOOST_TT_HAS_ACCURATE_IS_FUNCTION
 struct tricky_members
 {
    BOOST_TT_PROC void noexcept_proc()noexcept
@@ -85,7 +85,7 @@ BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_member_function_pointer<tcall_proc>::valu
 
 #endif
 
-#ifdef BOOST_TT_HAS_ASCCURATE_IS_FUNCTION
+#ifdef BOOST_TT_HAS_ACCURATE_IS_FUNCTION
 test_tricky(&tricky_members::const_ref_proc);
 #ifndef BOOST_TT_NO_NOEXCEPT_SEPARATE_TYPE
 test_tricky(&tricky_members::noexcept_proc);