diff --git a/drivers/staging/lustre/lustre/ptlrpc/client.c b/drivers/staging/lustre/lustre/ptlrpc/client.c
index 45b7af77c37e8cc58c1f58cd6ba0131b8b93e248..347110e6e822e686f9db59b909863a89a7083c9f 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/client.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/client.c
@@ -390,7 +390,7 @@ static int ptlrpc_at_recv_early_reply(struct ptlrpc_request *req)
 	return rc;
 }
 
-struct kmem_cache *request_cache;
+static struct kmem_cache *request_cache;
 
 int ptlrpc_request_cache_init(void)
 {