diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index b74c4e3..87f4f9a 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -79,7 +79,7 @@
 		     char __user *, size_t);
 static ssize_t   idmap_pipe_downcall(struct file *, const char __user *,
 		     size_t);
-void             idmap_pipe_destroy_msg(struct rpc_pipe_msg *);
+static void      idmap_pipe_destroy_msg(struct rpc_pipe_msg *);
 
 static unsigned int fnvhash32(const void *, size_t);
 
@@ -434,7 +434,7 @@
 	return ret;
 }
 
-void
+static void
 idmap_pipe_destroy_msg(struct rpc_pipe_msg *msg)
 {
 	struct idmap_msg *im = msg->data;