diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 5a1e02c..856a893 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -282,7 +282,7 @@
 	return sp;
 }
 
-void
+static void
 nfs4_drop_state_owner(struct nfs4_state_owner *sp)
 {
 	if (!RB_EMPTY_NODE(&sp->so_client_node)) {