diff --git a/include/rpc/des.h b/include/rpc/des.h
index f41e5a780481..74fa33241597 100644
--- a/include/rpc/des.h
+++ b/include/rpc/des.h
@@ -1,4 +1,5 @@
 /*  @(#)des.h	2.2 88/08/10 4.0 RPCSRC; from 2.7 88/02/08 SMI  */
+/* $FreeBSD$ */
 /*
  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  * unrestricted use provided that this legend is included on all tape
@@ -67,12 +68,12 @@ struct desparams {
 /*
  * Encrypt an arbitrary sized buffer
  */
-#define	DESIOCBLOCK	_IOWR(d, 6, struct desparams)
+#define	DESIOCBLOCK	_IOWR('d', 6, struct desparams)
 
 /* 
  * Encrypt of small amount of data, quickly
  */
-#define DESIOCQUICK	_IOWR(d, 7, struct desparams) 
+#define DESIOCQUICK	_IOWR('d', 7, struct desparams) 
 
 #endif