diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 582bfee40345..af84a92cb142 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -239,12 +239,12 @@ static struct svc_serv_ops nfs41_cb_sv_ops = {
 	.svo_module		= THIS_MODULE,
 };
 
-struct svc_serv_ops *nfs4_cb_sv_ops[] = {
+static struct svc_serv_ops *nfs4_cb_sv_ops[] = {
 	[0] = &nfs40_cb_sv_ops,
 	[1] = &nfs41_cb_sv_ops,
 };
 #else
-struct svc_serv_ops *nfs4_cb_sv_ops[] = {
+static struct svc_serv_ops *nfs4_cb_sv_ops[] = {
 	[0] = &nfs40_cb_sv_ops,
 	[1] = NULL,
 };