diff --git a/fs/lockd/xdr.c b/fs/lockd/xdr.c
index 033ea4a..61c46fa 100644
--- a/fs/lockd/xdr.c
+++ b/fs/lockd/xdr.c
@@ -515,7 +515,7 @@
  */
 #define NLM_void_sz		0
 #define NLM_cookie_sz		1+XDR_QUADLEN(NLM_MAXCOOKIELEN)
-#define NLM_caller_sz		1+XDR_QUADLEN(sizeof(system_utsname.nodename))
+#define NLM_caller_sz		1+XDR_QUADLEN(sizeof(utsname()->nodename))
 #define NLM_netobj_sz		1+XDR_QUADLEN(XDR_MAX_NETOBJ)
 /* #define NLM_owner_sz		1+XDR_QUADLEN(NLM_MAXOWNER) */
 #define NLM_fhandle_sz		1+XDR_QUADLEN(NFS2_FHSIZE)