diff --git a/src/sled/log/log.cc b/src/sled/log/log.cc
index 8bf10ca..ab8b868 100644
--- a/src/sled/log/log.cc
+++ b/src/sled/log/log.cc
@@ -142,14 +142,14 @@ SetLogLevel(LogLevel level)
 void
 SetLogFileName(const char *file_name)
 {
+    std::ofstream tmp_stream(file_name, std::ios_base::app);
     if (tmp_stream.is_open()) {
         Waiter waiter(g_request_id.fetch_add(1), g_current_id);
         waiter.wait();
         g_log_stream.close();
 
         g_log_file_name = file_name;
-        std::ofstream tmp_stream(file_name, std::ios_base::app);
-        g_log_stream = tmp_stream;
+        g_log_stream    = std::ofstream(file_name, std::ios_base::app);
     } else {
         LOGE("log", "can't open new log file [{}]", file_name);
         return;