diff --git a/include/omath/rev_eng/internal_rev_object.hpp b/include/omath/rev_eng/internal_rev_object.hpp
index be8772d..0270870 100644
--- a/include/omath/rev_eng/internal_rev_object.hpp
+++ b/include/omath/rev_eng/internal_rev_object.hpp
@@ -120,14 +120,14 @@ namespace omath::rev_eng
         ReturnType call_virtual_method(auto... arg_list)
         {
             const auto vtable = *reinterpret_cast<void***>(
-                reinterpret_cast<std::uintptr_t>(this) + TableIndex * sizeof(void*));
+                reinterpret_cast<std::uintptr_t>(this) + TableIndex * sizeof(std::uintptr_t));
             return call_method<ReturnType>(vtable[Id], arg_list...);
         }
         template<std::size_t TableIndex, std::size_t Id, class ReturnType>
         ReturnType call_virtual_method(auto... arg_list) const
         {
             const auto vtable = *reinterpret_cast<void* const* const*>(
-                reinterpret_cast<std::uintptr_t>(this) + TableIndex * sizeof(void*));
+                reinterpret_cast<std::uintptr_t>(this) + TableIndex * sizeof(std::uintptr_t));
             return call_method<ReturnType>(vtable[Id], arg_list...);
         }