diff --git a/src/windows_emulator/emulator_utils.hpp b/src/windows_emulator/emulator_utils.hpp
index 20a7e3b2..3e693a06 100644
--- a/src/windows_emulator/emulator_utils.hpp
+++ b/src/windows_emulator/emulator_utils.hpp
@@ -5,6 +5,8 @@ template <typename T>
 class emulator_object
 {
 public:
+	using value_type = T;
+
 	emulator_object() = default;
 
 	emulator_object(emulator& emu, const uint64_t address)
diff --git a/src/windows_emulator/syscalls.cpp b/src/windows_emulator/syscalls.cpp
index 98b8e4aa..a157f687 100644
--- a/src/windows_emulator/syscalls.cpp
+++ b/src/windows_emulator/syscalls.cpp
@@ -35,6 +35,7 @@ namespace
 	}
 
 	template <typename T>
+		requires(std::is_same_v<T, emulator_object<typename T::value_type>>)
 	T resolve_argument(x64_emulator& emu, const size_t index)
 	{
 		const auto arg = get_syscall_argument(emu, index);