diff --git a/include/MacStd/common.hpp b/include/MacStd/common.hpp
index d4f05a5..8d4dda3 100644
--- a/include/MacStd/common.hpp
+++ b/include/MacStd/common.hpp
@@ -12,16 +12,16 @@
 ///
 #define MACSTD_NONCOPYABLE(C) \
 private: \
-	   C        (_In_ const C &h) noexcept; \
-	C& operator=(_In_ const C &h) noexcept;
+	   C        (const C &h) noexcept; \
+	C& operator=(const C &h) noexcept;
 
 ///
 /// Declares a class as non-movable
 ///
 #define MACSTD_NONMOVABLE(C) \
 private: \
-	   C        (_Inout_ C &&h) noexcept; \
-	C& operator=(_Inout_ C &&h) noexcept;
+	   C        (C &&h) noexcept; \
+	C& operator=(C &&h) noexcept;
 
 ///
 /// Size of the stack buffer in bytes used for initial system function call
@@ -342,7 +342,7 @@ namespace macstd
 		/// \param[in] num  Numeric error code
 		/// \param[in] msg  Error message
 		///
-		num_runtime_error(_In_ error_type num, _In_ const std::string& msg) :
+		num_runtime_error(error_type num, const std::string& msg) :
 			m_num(num),
 			runtime_error(msg)
 		{}
@@ -353,7 +353,7 @@ namespace macstd
 		/// \param[in] num  Numeric error code
 		/// \param[in] msg  Error message
 		///
-		num_runtime_error(_In_ error_type num, _In_z_ const char *msg) :
+		num_runtime_error(error_type num, _In_z_ const char *msg) :
 			m_num(num),
 			runtime_error(msg)
 		{}