diff --git a/tools/im2rec.py b/tools/im2rec.py
index d72efc4c9b11..6bfcf6057b5b 100644
--- a/tools/im2rec.py
+++ b/tools/im2rec.py
@@ -144,6 +144,8 @@ def write_worker(q_out, fname, working_dir):
             print('time:', cur_time - pre_time, ' count:', count)
             pre_time = cur_time
         count += 1
+    fout.close()
+    os.remove(fname)
     os.rename(fname+'.tmp', fname)
 
 def parse_args():