diff --git a/man2/syscalls.2 b/man2/syscalls.2
index 9bcf7c210..fbc61ac7a 100644
--- a/man2/syscalls.2
+++ b/man2/syscalls.2
@@ -466,6 +466,7 @@ T}
 \fBs390_pci_mmio_read\fP(2)	3.19	s390 only
 \fBs390_pci_mmio_write\fP(2)	3.19	s390 only
 \fBs390_sthyi\fP(2)	4.15	s390 only
+\fBs390_guarded_storage\fP(2)	4.12	s390 only
 \fBsched_get_priority_max\fP(2)	2.0
 \fBsched_get_priority_min\fP(2)	2.0
 \fBsched_getaffinity\fP(2)	2.6