diff --git a/mingw-w64-crt/crt/tlssup.c b/mingw-w64-crt/crt/tlssup.c
index 47beb27..1b9d7b4 100644
--- a/mingw-w64-crt/crt/tlssup.c
+++ b/mingw-w64-crt/crt/tlssup.c
@@ -44,6 +44,7 @@
 _CRTALLOC(".CRT$XLA") PIMAGE_TLS_CALLBACK __xl_a = 0;
 _CRTALLOC(".CRT$XLZ") PIMAGE_TLS_CALLBACK __xl_z = 0;
 
+__attribute__((used))
 const IMAGE_TLS_DIRECTORY _tls_used = {
   (ULONG_PTR) &_tls_start, (ULONG_PTR) &_tls_end,
   (ULONG_PTR) &_tls_index, (ULONG_PTR) (&__xl_a+1),