c3-lang/libffi

diff --git a/testsuite/libffi.call/struct10.c b/testsuite/libffi.call/struct10.c
index 17b1377..1edbd5f 100644
--- a/testsuite/libffi.call/struct10.c
+++ b/testsuite/libffi.call/struct10.c
@@ -16,7 +16,7 @@ struct s {
   signed char s8;
 };
 
-struct s make_s(void) {
+struct s ABI_ATTR make_s(void) {
   struct s r;
   r.s32 = 0x1234;
   r.f32 = 7.0;