diff --git a/components/dfs/src/poll.c b/components/dfs/src/poll.c
index f95a9b1845..01d41da18b 100644
--- a/components/dfs/src/poll.c
+++ b/components/dfs/src/poll.c
@@ -222,7 +222,7 @@ int poll(struct pollfd *fds, nfds_t nfds, int timeout)
     poll_table_init(&table);
 
     num = poll_do(fds, nfds, &table, timeout);
-	
+
     poll_teardown(&table);
 
     return num;