Initial reintegration of legacy update process that used update-script
diff --git a/install.h b/install.h
index a7ebc09..42c1444 100644
--- a/install.h
+++ b/install.h
@@ -19,7 +19,7 @@
 
 #include "common.h"
 
-enum { INSTALL_SUCCESS, INSTALL_ERROR, INSTALL_CORRUPT };
+enum { INSTALL_SUCCESS, INSTALL_ERROR, INSTALL_CORRUPT, INSTALL_UPDATE_BINARY_MISSING };
 int install_package(const char *root_path);
 
 #endif  // RECOVERY_INSTALL_H_