diff --git a/pgrep.1 b/pgrep.1
index 8f7cd8ea..2fc1c98a 100644
--- a/pgrep.1
+++ b/pgrep.1
@@ -110,7 +110,9 @@ Only match processes whose real user ID is listed.  Either the numerical or
 symbolical value may be used.
 .TP
 \fB\-v\fR, \fB\-\-inverse\fR\fR
-Negates the matching.  (\fBpgrep\fP only.)
+Negates the matching.  This option usually used in pgrep context.  In
+.B pkill
+context the short option is disabled to avoid accidental usage of the option.
 .TP
 \fB\-x\fR, \fB\-\-exact\fR\fR
 Only match processes whose name (or command line if \-f is specified)