diff --git a/install.h b/install.h
index 2ada529..53c0d31 100644
--- a/install.h
+++ b/install.h
@@ -28,7 +28,7 @@
 // returned and *wipe_cache is true on exit, caller should wipe the
 // cache partition.
 int install_package(const char *root_path, int* wipe_cache,
-                    const char* install_file);
+                    const char* install_file, bool needs_mount);
 
 #ifdef __cplusplus
 }