diff --git a/usr.sbin/rpcbind/warmstart.c b/usr.sbin/rpcbind/warmstart.c
index fea278952f26..fed92315e0d1 100644
--- a/usr.sbin/rpcbind/warmstart.c
+++ b/usr.sbin/rpcbind/warmstart.c
@@ -144,9 +144,9 @@ error:	fprintf(stderr, "rpcbind: will start from scratch\n");
 void
 write_warmstart()
 {
-	(void) write_struct(RPCBFILE, xdr_rpcblist_ptr, &list_rbl);
+	(void) write_struct(RPCBFILE, (xdrproc_t)xdr_rpcblist_ptr, &list_rbl);
 #ifdef PORTMAP
-	(void) write_struct(PMAPFILE, xdr_pmaplist_ptr, &list_pml);
+	(void) write_struct(PMAPFILE, (xdrproc_t)xdr_pmaplist_ptr, &list_pml);
 #endif
 
 }
@@ -160,11 +160,11 @@ read_warmstart()
 #endif
 	int ok1, ok2 = TRUE;
 
-	ok1 = read_struct(RPCBFILE, xdr_rpcblist_ptr, &tmp_rpcbl);
+	ok1 = read_struct(RPCBFILE, (xdrproc_t)xdr_rpcblist_ptr, &tmp_rpcbl);
 	if (ok1 == FALSE)
 		return;
 #ifdef PORTMAP
-	ok2 = read_struct(PMAPFILE, xdr_pmaplist_ptr, &tmp_pmapl);
+	ok2 = read_struct(PMAPFILE, (xdrproc_t)xdr_pmaplist_ptr, &tmp_pmapl);
 #endif
 	if (ok2 == FALSE) {
 		xdr_free((xdrproc_t) xdr_rpcblist_ptr, (char *)&tmp_rpcbl);