diff --git a/include/PSX/System/IOPorts/ioport.hpp b/include/PSX/System/IOPorts/ioport.hpp
index 7bec4c6d..63c72ce0 100644
--- a/include/PSX/System/IOPorts/ioport.hpp
+++ b/include/PSX/System/IOPorts/ioport.hpp
@@ -77,13 +77,14 @@ namespace JabyEngine {
     template<typename T>
     struct IOPort {
         using Value = T;
+        T value;
 
         T read() const {
-            return {const_cast<const volatile Value*>(reinterpret_cast<const Value*>(this))->raw};
+            return {const_cast<const volatile IOPort<T>*>(this)->value.raw};
         }
 
         void write(T value) {
-            const_cast<volatile Value*>(reinterpret_cast<Value*>(this))->raw = value.raw;
+            const_cast<volatile IOPort<T>*>(this)->value.raw = value.raw;
         }
     };