diff --git a/arch/s390x/bits/syscall.h.in b/arch/s390x/bits/syscall.h.in
index 4fe1a64f..c965664c 100644
--- a/arch/s390x/bits/syscall.h.in
+++ b/arch/s390x/bits/syscall.h.in
@@ -322,4 +322,5 @@
 #define __NR_pwritev2                   377
 #define __NR_s390_guarded_storage       378
 #define __NR_statx                      379
+#define __NR_s390_sthyi                 380