diff --git a/trunk/src/kernel/srs_kernel_file.cpp b/trunk/src/kernel/srs_kernel_file.cpp
index 95e1139fa..27702f9e6 100644
--- a/trunk/src/kernel/srs_kernel_file.cpp
+++ b/trunk/src/kernel/srs_kernel_file.cpp
@@ -81,7 +81,7 @@ srs_error_t SrsFileWriter::open_append(string p)
         return srs_error_new(ERROR_SYSTEM_FILE_ALREADY_OPENED, "file %s already opened", path.c_str());
     }
     
-    int flags = O_APPEND|O_WRONLY;
+    int flags = O_CREAT|O_APPEND|O_WRONLY;
     mode_t mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH;
     
     if ((fd = _srs_open_fn(p.c_str(), flags, mode)) < 0) {