diff --git a/arch/Kconfig b/arch/Kconfig
index a65eafb..bec6666 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -499,6 +499,13 @@
 	  - arch_mmap_rnd()
 	  - arch_randomize_brk()
 
+config HAVE_COPY_THREAD_TLS
+	bool
+	help
+	  Architecture provides copy_thread_tls to accept tls argument via
+	  normal C parameter passing, rather than extracting the syscall
+	  argument from pt_regs.
+
 #
 # ABI hall of shame
 #