diff --git a/include/rpc/rpcent.h b/include/rpc/rpcent.h
index 405ba67804f5..c1650fa4ca79 100644
--- a/include/rpc/rpcent.h
+++ b/include/rpc/rpcent.h
@@ -56,7 +56,7 @@ __BEGIN_DECLS
  * These interfaces are currently implemented through nsswitch and are
  * MT-safe.
  */
-extern struct rpcent *getrpcbyname(char *);
+extern struct rpcent *getrpcbyname(const char *);
 extern struct rpcent *getrpcbynumber(int);
 extern struct rpcent *getrpcent(void);
 extern void setrpcent(int);
diff --git a/lib/libc/rpc/getrpcent.3 b/lib/libc/rpc/getrpcent.3
index 1a999eb3f9cb..e36d31c4a7ba 100644
--- a/lib/libc/rpc/getrpcent.3
+++ b/lib/libc/rpc/getrpcent.3
@@ -2,7 +2,7 @@
 .\" $NetBSD: getrpcent.3,v 1.6 1998/02/05 18:49:06 perry Exp $
 .\" $FreeBSD$
 .\"
-.Dd December 14, 1987
+.Dd February 26, 2016
 .Dt GETRPCENT 3
 .Os
 .Sh NAME
@@ -19,7 +19,7 @@
 .Ft struct rpcent *
 .Fn getrpcent void
 .Ft struct rpcent *
-.Fn getrpcbyname "char *name"
+.Fn getrpcbyname "const char *name"
 .Ft struct rpcent *
 .Fn getrpcbynumber "int number"
 .Ft void
diff --git a/lib/libc/rpc/getrpcent.c b/lib/libc/rpc/getrpcent.c
index 72c5da89746b..2bfe1ab7981a 100644
--- a/lib/libc/rpc/getrpcent.c
+++ b/lib/libc/rpc/getrpcent.c
@@ -969,7 +969,7 @@ getrpc(int (*fn)(union key, struct rpcent *, char *, size_t, struct rpcent **),
 }
 
 struct rpcent *
-getrpcbyname(char *name)
+getrpcbyname(const char *name)
 {
 	union key key;