diff --git a/lib/libsys/procctl.2 b/lib/libsys/procctl.2
index cb5234b6e40c..049568c5fc09 100644
--- a/lib/libsys/procctl.2
+++ b/lib/libsys/procctl.2
@@ -841,7 +841,7 @@ or invalid signal number.
 The
 .Fn procctl
 function appeared in
-.Fx 10.0 .
+.Fx 9.3 .
 .Pp
 The reaper facility is based on a similar feature of Linux and
 DragonflyBSD, and first appeared in