diff --git a/share/man/man9/VOP_IOCTL.9 b/share/man/man9/VOP_IOCTL.9
index 1ea2482d6dae..93dbdcb90a9a 100644
--- a/share/man/man9/VOP_IOCTL.9
+++ b/share/man/man9/VOP_IOCTL.9
@@ -48,7 +48,7 @@ Its arguments are:
 The vnode of the file (normally representing a device).
 .It Fa command
 The device specific operation to perform.
-.It Fa cnp
+.It Fa data
 Extra data for the specified operation.
 .It Fa fflag
 Some flags ???