diff --git a/man2/prctl.2 b/man2/prctl.2
index 15a0b2940..6d61a8707 100644
--- a/man2/prctl.2
+++ b/man2/prctl.2
@@ -954,7 +954,9 @@ will operate in the privilege-restricting mode described above.
 .BR PR_SET_PDEATHSIG " (since Linux 2.1.57)"
 Set the parent-death signal
 of the calling process to \fIarg2\fP (either a signal value
-in the range 1..maxsig, or 0 to clear).
+in the range 1 ..
+.BR NSIG " \-"
+1, or 0 to clear).
 This is the signal that the calling process will get when its
 parent dies.
 .IP