diff --git a/libretro.h b/libretro.h
index fef36cacde..0b402efa4a 100755
--- a/libretro.h
+++ b/libretro.h
@@ -111,6 +111,7 @@ struct retro_system_info
    const char *library_version;
    const char *valid_extensions;
    bool        need_fullpath;
+   bool        block_extract;
 };
 
 struct retro_game_geometry