diff --git a/doc/changelog.qbk b/doc/changelog.qbk
index 91b9caf..39888cc 100644
--- a/doc/changelog.qbk
+++ b/doc/changelog.qbk
@@ -10,6 +10,9 @@
 [section unreleased]
 Not yet released
 
+* Fixed MOCK_FUNCTOR compilation with VS2015
+* Removed round parenthesis in signature support for compilers without variadic macros
+
 [endsect]
 
 [section 1.2.8]
diff --git a/doc/reference.qbk b/doc/reference.qbk
index b4797ef..c872cc2 100644
--- a/doc/reference.qbk
+++ b/doc/reference.qbk
@@ -101,8 +101,6 @@ Synopsis :
 
 [note The signature cannot be omitted for the _TPL familly of macros, see the related [link turtle.limitations.template_base_class_methods_cannot_be_mocked_without_specifying_the_signature limitation section].]
 
-[note The signature must be surrounded with round parenthesis if the return type contains a comma.]
-
 [note [link turtle.reference.creation.constructor Constructors], [link turtle.reference.creation.destructor destructors] and [link turtle.reference.creation.conversion_operator conversion operators] require special care.]
 
 [note In case of a calling convention specified, all four parameters must be provided.]
diff --git a/include/turtle/mock.hpp b/include/turtle/mock.hpp
index a560800..78fb185 100644
--- a/include/turtle/mock.hpp
+++ b/include/turtle/mock.hpp
@@ -28,7 +28,7 @@
     struct T : mock::object
 
 #define MOCK_FUNCTION_TYPE(S, tpn) \
-    tpn boost::remove_pointer< tpn BOOST_IDENTITY_TYPE((S)) >::type
+    tpn boost::remove_pointer< tpn BOOST_IDENTITY_TYPE(S) >::type
 
 #ifdef MOCK_VARIADIC_MACROS
 
@@ -47,10 +47,10 @@
     struct T : B, mock::object, mock::detail::base< B >
 
 #define MOCK_FUNCTOR(f, S) \
-    mock::detail::functor< MOCK_FUNCTION_TYPE(S,) > f, f##_mock
+    mock::detail::functor< MOCK_FUNCTION_TYPE((S),) > f, f##_mock
 #define MOCK_FUNCTOR_TPL(f, S) \
     mock::detail::functor< \
-        MOCK_FUNCTION_TYPE(S, typename) > f, f##_mock
+        MOCK_FUNCTION_TYPE((S), typename) > f, f##_mock
 
 #endif // MOCK_VARIADIC_MACROS
 
@@ -60,8 +60,8 @@
     t##_mock( mock::detail::root, "?." )
 
 #define MOCK_METHOD_HELPER(S, t, tpn) \
-    mutable mock::detail::function< MOCK_FUNCTION_TYPE(S, tpn) > t##_mock_; \
-    mock::detail::function< MOCK_FUNCTION_TYPE(S, tpn) >& t##_mock( \
+    mutable mock::detail::function< MOCK_FUNCTION_TYPE((S), tpn) > t##_mock_; \
+    mock::detail::function< MOCK_FUNCTION_TYPE((S), tpn) >& t##_mock( \
         const mock::detail::context&, \
         boost::unit_test::const_string instance ) const \
     { \
@@ -76,10 +76,10 @@
     BOOST_PP_COMMA_IF(n) d, n >::type p##n
 #define MOCK_PARAMS(n, S, tpn) \
     BOOST_PP_REPEAT(n, MOCK_PARAM, \
-        tpn mock::detail::parameter< MOCK_FUNCTION_TYPE(S, tpn))
+        tpn mock::detail::parameter< MOCK_FUNCTION_TYPE((S), tpn))
 #define MOCK_DECL(M, n, S, c, tpn) \
     tpn boost::function_types::result_type< \
-        MOCK_FUNCTION_TYPE(S, tpn) >::type M( \
+        MOCK_FUNCTION_TYPE((S), tpn) >::type M( \
             MOCK_PARAMS(n, S, tpn) ) c
 
 #define MOCK_METHOD_AUX(M, n, S, t, c, tpn) \
@@ -87,7 +87,7 @@
     { \
         BOOST_MPL_ASSERT_RELATION( n, ==, \
             boost::function_types::function_arity< \
-                MOCK_FUNCTION_TYPE(S, tpn) >::value ); \
+                MOCK_FUNCTION_TYPE((S), tpn) >::value ); \
         return MOCK_ANONYMOUS_HELPER(t)( \
             BOOST_PP_ENUM_PARAMS(n, p) ); \
     }
@@ -137,11 +137,11 @@
     MOCK_METHOD_HELPER(T(), t, typename)
 
 #define MOCK_FUNCTION_HELPER(S, t, s, tpn) \
-    s mock::detail::function< MOCK_FUNCTION_TYPE(S, tpn) >& t##_mock( \
+    s mock::detail::function< MOCK_FUNCTION_TYPE((S), tpn) >& t##_mock( \
         mock::detail::context& context, \
         boost::unit_test::const_string instance ) \
     { \
-        static mock::detail::function< MOCK_FUNCTION_TYPE(S, tpn) > f; \
+        static mock::detail::function< MOCK_FUNCTION_TYPE((S), tpn) > f; \
         return f( context, instance ); \
     }
 
@@ -167,7 +167,7 @@
     { \
         BOOST_MPL_ASSERT_RELATION( n, ==, \
             boost::function_types::function_arity< \
-                MOCK_FUNCTION_TYPE(S, tpn) >::value ); \
+                MOCK_FUNCTION_TYPE((S), tpn) >::value ); \
         return MOCK_HELPER(t)( BOOST_PP_ENUM_PARAMS(n, p) ); \
     }
 
@@ -178,7 +178,7 @@
 #define MOCK_VARIADIC_ELEM_2(e0, e1, e2, ...) e2
 
 #define MOCK_METHOD_SIGNATURE(M, n, S, t) \
-    typedef MOCK_FUNCTION_TYPE(S,) BOOST_PP_CAT(t,_sig_type); \
+    typedef MOCK_FUNCTION_TYPE((S),) BOOST_PP_CAT(t,_sig_type); \
     MOCK_METHOD_EXT(M, n, BOOST_PP_CAT(t,_sig_type), t)
 #define MOCK_METHOD(M, ...) \
     MOCK_METHOD_SIGNATURE(M, \
diff --git a/test/test_mock.cpp b/test/test_mock.cpp
index 7a41f6f..3a83bae 100644
--- a/test/test_mock.cpp
+++ b/test/test_mock.cpp
@@ -346,11 +346,11 @@ namespace
 {
     MOCK_CLASS( round_parenthesized_signature )
     {
-        MOCK_METHOD_EXT( m0, 0, (std::map< int, int >()), m0 )
-        MOCK_STATIC_METHOD( m1, 0, (std::map< int, int >()), m1 )
-        MOCK_FUNCTOR( f0, (std::map< int, int >()) );
+        MOCK_METHOD_EXT( m0, 0, BOOST_IDENTITY_TYPE((std::map< int, int >())), m0 )
+        MOCK_STATIC_METHOD( m1, 0, BOOST_IDENTITY_TYPE((std::map< int, int >())), m1 )
+        MOCK_FUNCTOR( f0, BOOST_IDENTITY_TYPE((std::map< int, int >())) );
     };
-    MOCK_FUNCTION( fun0, 0, (std::map< int, int >()), fun0 )
+    MOCK_FUNCTION( fun0, 0, BOOST_IDENTITY_TYPE((std::map< int, int >())), fun0 )
 }
 
 #ifdef MOCK_VARIADIC_MACROS
@@ -397,7 +397,7 @@ namespace
 
     MOCK_FUNCTION( fun1, 0, void() )
     MOCK_FUNCTION( fun2, 0, void(), fun2 )
-    MOCK_FUNCTION( fun3, 0, (std::map< int, int >()) )
+    MOCK_FUNCTION( fun3, 0, BOOST_IDENTITY_TYPE((std::map< int, int >())) )
 
     MOCK_FUNCTOR( f_variadic, std::map< int, int >() );
 }