diff --git a/asio/include/asio/detail/thread_info_base.hpp b/asio/include/asio/detail/thread_info_base.hpp
index acc591c3ce..5043f953bb 100644
--- a/asio/include/asio/detail/thread_info_base.hpp
+++ b/asio/include/asio/detail/thread_info_base.hpp
@@ -239,11 +239,7 @@ class thread_info_base
   }
 
 private:
-#if defined(ASIO_HAS_IO_URING)
   enum { chunk_size = 8 };
-#else // defined(ASIO_HAS_IO_URING)
-  enum { chunk_size = 4 };
-#endif // defined(ASIO_HAS_IO_URING)
   void* reusable_memory_[max_mem_index];
 
 #if !defined(ASIO_NO_EXCEPTIONS)