diff --git a/tools/releasetools/both_generator.py b/tools/releasetools/both_generator.py
index c042ae6..4ae8d50 100644
--- a/tools/releasetools/both_generator.py
+++ b/tools/releasetools/both_generator.py
@@ -41,6 +41,7 @@
   def AssertSomeBootloader(self, *a): self._DoBoth("AssertSomeBootloader", *a)
   def ShowProgress(self, *a): self._DoBoth("ShowProgress", *a)
   def PatchCheck(self, *a): self._DoBoth("PatchCheck", *a)
+  def FileCheck(self, filename, *sha1): self._DoBoth("FileCheck", *a)
   def CacheFreeSpaceCheck(self, *a): self._DoBoth("CacheFreeSpaceCheck", *a)
   def Mount(self, *a): self._DoBoth("Mount", *a)
   def UnpackPackageDir(self, *a): self._DoBoth("UnpackPackageDir", *a)