diff --git a/tools/curve_keygen.c b/tools/curve_keygen.c
index 621d1d84..a92dd9a9 100644
--- a/tools/curve_keygen.c
+++ b/tools/curve_keygen.c
@@ -3,15 +3,12 @@
 
     This file is part of 0MQ.
 
-    This tool generates a keypair for the libzmq CURVE security mechanism, 
-    and encodes the keypair to give two printable strings that you can use 
-    in configuration files or source code. The encoding uses Z85, which is 
-    a base-85 format that is described in 0MQ RFC 32, and which has an 
-    implementation in the Z85.c source used by this tool. The keypair 
+    This tool generates a CurveZMQ keypair, as two printable strings you can 
+    use in configuration files or source code. The encoding uses Z85, which 
+    is a base-85 format that is described in 0MQ RFC 32, and which has an 
+    implementation in the z85_codec.h source used by this tool. The keypair 
     always works with the secret key held by one party and the public key 
-    distributed (securely!) to peers wishing to connect to it. CURVE is 
-    defined by http://rfc.zeromq.org/spec:25. Z85 is defined by 
-    http://rfc.zeromq.org/spec:32.
+    distributed (securely!) to peers wishing to connect to it.
 
     0MQ is free software; you can redistribute it and/or modify it under
     the terms of the GNU Lesser General Public License as published by
@@ -40,15 +37,12 @@ int main (void)
 #   error "libsodium not built correctly"
 #   endif
     
-    puts ("This tool generates a keypair for the libzmq CURVE security mechanism,");
-    puts ("and encodes the keypair to give two printable strings that you can use");
-    puts ("in configuration files or source code. The encoding uses Z85, which is");
-    puts ("a base-85 format that is described in 0MQ RFC 32, and which has an");
-    puts ("implementation in the Z85.c source used by this tool. The keypair");
+    puts ("This tool generates a CurveZMQ keypair, as two printable strings you can");
+    puts ("use in configuration files or source code. The encoding uses Z85, which");
+    puts ("is a base-85 format that is described in 0MQ RFC 32, and which has an");
+    puts ("implementation in the z85_codec.h source used by this tool. The keypair");
     puts ("always works with the secret key held by one party and the public key");
-    puts ("distributed (securely!) to peers wishing to connect to it. CURVE is");
-    puts ("defined by http://rfc.zeromq.org/spec:25. Z85 is defined by");
-    puts ("http://rfc.zeromq.org/spec:32.");
+    puts ("distributed (securely!) to peers wishing to connect to it.");
 
     uint8_t public_key [32];
     uint8_t secret_key [32];