diff --git a/applypatch/applypatch.h b/applypatch/applypatch.h
index fb58843..d1a0232 100644
--- a/applypatch/applypatch.h
+++ b/applypatch/applypatch.h
@@ -55,7 +55,8 @@
                size_t target_size,
                int num_patches,
                char** const patch_sha1_str,
-               Value** patch_data);
+               Value** patch_data,
+               Value* bonus_data);
 int applypatch_check(const char* filename,
                      int num_patches,
                      char** const patch_sha1_str);
@@ -79,7 +80,8 @@
 // imgpatch.c
 int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size,
                     const Value* patch,
-                    SinkFn sink, void* token, SHA_CTX* ctx);
+                    SinkFn sink, void* token, SHA_CTX* ctx,
+                    const Value* bonus_data);
 
 // freecache.c
 int MakeFreeSpaceOnCache(size_t bytes_needed);