diff --git a/iwla.py b/iwla.py
index 650dbdc..91c1727 100755
--- a/iwla.py
+++ b/iwla.py
@@ -249,6 +249,7 @@ class IWLA(object):
 
         with open(filename + '.tmp', 'wb+') as f, self._openDB(filename, 'w') as fzip:
             pickle.dump(obj, f)
+            os.fsync(f)
             f.seek(0)
             fzip.write(f.read())
         os.remove(filename + '.tmp')