diff --git a/bin/confgen/ddns-confgen.rst b/bin/confgen/ddns-confgen.rst
index 96e1286e2b..de4420e299 100644
--- a/bin/confgen/ddns-confgen.rst
+++ b/bin/confgen/ddns-confgen.rst
@@ -18,9 +18,9 @@ ddns-confgen - ddns key generation tool
 
 Synopsis
 ~~~~~~~~
-:program:`tsig-keygen` [**-a** algorithm] [**-h**] [**-r** randomfile] [name]
+:program:`tsig-keygen` [**-a** algorithm] [**-h**] [name]
 
-:program:`ddns-confgen` [**-a** algorithm] [**-h**] [**-k** keyname] [**-q**] [**-r** randomfile] [**-s** name] [**-z** zone]
+:program:`ddns-confgen` [**-a** algorithm] [**-h**] [**-k** keyname] [**-q**] [**-s** name] [**-z** zone]
 
 Description
 ~~~~~~~~~~~
diff --git a/doc/man/ddns-confgen.8in b/doc/man/ddns-confgen.8in
index ec444320b2..ed5872ea97 100644
--- a/doc/man/ddns-confgen.8in
+++ b/doc/man/ddns-confgen.8in
@@ -32,9 +32,9 @@ level margin: \\n[rst2man-indent\\n[rst2man-indent-level]]
 ddns-confgen \- ddns key generation tool
 .SH SYNOPSIS
 .sp
-\fBtsig\-keygen\fP [\fB\-a\fP algorithm] [\fB\-h\fP] [\fB\-r\fP randomfile] [name]
+\fBtsig\-keygen\fP [\fB\-a\fP algorithm] [\fB\-h\fP] [name]
 .sp
-\fBddns\-confgen\fP [\fB\-a\fP algorithm] [\fB\-h\fP] [\fB\-k\fP keyname] [\fB\-q\fP] [\fB\-r\fP randomfile] [\fB\-s\fP name] [\fB\-z\fP zone]
+\fBddns\-confgen\fP [\fB\-a\fP algorithm] [\fB\-h\fP] [\fB\-k\fP keyname] [\fB\-q\fP] [\fB\-s\fP name] [\fB\-z\fP zone]
 .SH DESCRIPTION
 .sp
 \fBtsig\-keygen\fP and \fBddns\-confgen\fP are invocation methods for a