diff --git a/core/src/asset.h b/core/src/asset.h
index c113ed5..f5739b7 100644
--- a/core/src/asset.h
+++ b/core/src/asset.h
@@ -23,7 +23,7 @@ static inline Asset T##_as_Asset(T* x) {\
     TC_FN_TYPECHECK(asset_id, get_id_f, T*);\
     TC_FN_TYPECHECK(void, set_id_f, T*, asset_id);\
     TC_FN_TYPECHECK(Drop, T##_as_Drop, T*);\
-    static IAsset tc = (IAsset){\
+    static IAsset const tc = {\
         .get_id = (asset_id(*const)(void*))      get_id_f,\
         .set_id = (void(*const)(void*,asset_id)) set_id_f,\
     };\