diff --git a/vendor/golang.org/x/sys/unix/zsysctl_openbsd_amd64.go b/vendor/golang.org/x/sys/unix/zsysctl_openbsd_amd64.go
index fe6caa6..4866fce 100644
--- a/vendor/golang.org/x/sys/unix/zsysctl_openbsd_amd64.go
+++ b/vendor/golang.org/x/sys/unix/zsysctl_openbsd_amd64.go
@@ -31,6 +31,7 @@
 	{"hw.model", []_C_int{6, 2}},
 	{"hw.ncpu", []_C_int{6, 3}},
 	{"hw.ncpufound", []_C_int{6, 21}},
+	{"hw.ncpuonline", []_C_int{6, 25}},
 	{"hw.pagesize", []_C_int{6, 7}},
 	{"hw.perfpolicy", []_C_int{6, 23}},
 	{"hw.physmem", []_C_int{6, 19}},