diff --git a/c-api/cache/CachedBaseObject.h b/c-api/cache/CachedBaseObject.h
index 2d7dfa4..613528f 100644
--- a/c-api/cache/CachedBaseObject.h
+++ b/c-api/cache/CachedBaseObject.h
@@ -67,5 +67,14 @@ namespace cache
         {
             return false;
         }
+
+        void SetMultipleMetaData(const std::unordered_map<std::string, alt::MValue>& values) override {}
+
+#ifdef ALT_SERVER_API
+        void SetMultipleSyncedMetaData(const std::unordered_map<std::string, alt::MValue>& values) override {}
+        void SetSyncedMetaData(const std::string& key, alt::MValue val) override {}
+        void DeleteSyncedMetaData(const std::string& key) override {}
+#endif
+
     };
 } // namespace alt
diff --git a/c-api/cache/CachedEntity.h b/c-api/cache/CachedEntity.h
index d44b5e3..2213e6a 100644
--- a/c-api/cache/CachedEntity.h
+++ b/c-api/cache/CachedEntity.h
@@ -210,6 +210,8 @@ namespace cache
         {
             return _timestamp;
         }
+
+        void SetMultipleStreamSyncedMetaData(const std::unordered_map<std::string, alt::MValue>& values) override {}
 #endif