diff --git a/include/stdexec/__detail/__config.hpp b/include/stdexec/__detail/__config.hpp
index ac7002a0d..11be7aafc 100644
--- a/include/stdexec/__detail/__config.hpp
+++ b/include/stdexec/__detail/__config.hpp
@@ -482,16 +482,16 @@ namespace STDEXEC::__std
 #if STDEXEC_HAS_BUILTIN(__remove_reference)
 namespace STDEXEC
 {
-  template <class Ty>
-  using __unref_t = __remove_reference(Ty);
+  template <class _Ty>
+  using __unref_t = __remove_reference(_Ty);
 }  // namespace STDEXEC
 
 #  define STDEXEC_REMOVE_REFERENCE(...) STDEXEC::__unref_t<__VA_ARGS__>
 #elif STDEXEC_HAS_BUILTIN(__remove_reference_t)
 namespace STDEXEC
 {
-  template <class Ty>
-  using __unref_t = __remove_reference_t(Ty);
+  template <class _Ty>
+  using __unref_t = __remove_reference_t(_Ty);
 }  // namespace STDEXEC
 
 #  define STDEXEC_REMOVE_REFERENCE(...) STDEXEC::__unref_t<__VA_ARGS__>