diff --git a/src/action-log.h b/src/action-log.h
index 28b221a..7a154c1 100644
--- a/src/action-log.h
+++ b/src/action-log.h
@@ -49,6 +49,9 @@
   void
   AddActionDelete (const std::string &filename);
 
+  bool
+  KnownFileState(const std::string &filename, const Hash &hash);
+
 private:
   boost::tuple<sqlite3_int64, sqlite3_int64, sqlite3_int64, std::string>
   GetExistingRecord (const std::string &filename);