diff --git a/lib/libc/gen/sysctl.3 b/lib/libc/gen/sysctl.3
index a6097bbefa4..5ed1261283b 100644
--- a/lib/libc/gen/sysctl.3
+++ b/lib/libc/gen/sysctl.3
@@ -433,12 +433,6 @@ Each element of the array contains the kernel address of a vnode
 .Va struct vnode *
 followed by the vnode itself
 .Va struct vnode .
-.It Li KERN_UPDATEINTERVAL
-The interval between
-.Xr sync 2
-calls in the
-.Xr syncer 4
-process.
 .El
 .Ss CTL_MACHDEP
 The set of variables defined is architecture dependent.