diff --git a/InstructionSets/x86/AccessType.hpp b/InstructionSets/x86/AccessType.hpp
index 6f90345a4..b666c59ea 100644
--- a/InstructionSets/x86/AccessType.hpp
+++ b/InstructionSets/x86/AccessType.hpp
@@ -56,6 +56,7 @@ template <typename IntT> struct Accessor<IntT, AccessType::ReadModifyWrite> { us
 template<typename IntT> using read_t = typename Accessor<IntT, AccessType::Read>::type;
 template<typename IntT> using write_t = typename Accessor<IntT, AccessType::Write>::type;
 template<typename IntT> using modify_t = typename Accessor<IntT, AccessType::ReadModifyWrite>::type;
+template<typename IntT, AccessType type> using access_t = typename Accessor<IntT, type>::type;
 
 }
 
diff --git a/InstructionSets/x86/Implementation/PerformImplementation.hpp b/InstructionSets/x86/Implementation/PerformImplementation.hpp
index 3d854b86a..c3a3626f6 100644
--- a/InstructionSets/x86/Implementation/PerformImplementation.hpp
+++ b/InstructionSets/x86/Implementation/PerformImplementation.hpp
@@ -281,7 +281,7 @@ void add(IntT &destination, IntT source, ContextT &context) {
 
 template <bool with_borrow, AccessType destination_type, typename IntT, typename ContextT>
 void sub(
-	typename Accessor<IntT, destination_type>::type destination,
+	access_t<IntT, destination_type> destination,
 	read_t<IntT> source,
 	ContextT &context
 ) {