diff --git a/releasetools.py b/releasetools.py
index 4f1cba1..2239c51 100644
--- a/releasetools.py
+++ b/releasetools.py
@@ -15,6 +15,11 @@
 import common
 import struct
 
+def IncrementalOTA_InstallBegin(info):
+  info.script.Unmount("/system")
+  info.script.TunePartition("/system", "-O", "^has_journal")
+  info.script.Mount("/system")
+
 def FullOTA_PostValidate(info):
   # run e2fsck
   info.script.AppendExtra('run_program("/sbin/e2fsck", "-fy", "/dev/block/platform/msm_sdcc.1/by-name/system");');