diff --git a/LiteLoader/include/llapi/mc/Dimension.hpp b/LiteLoader/include/llapi/mc/Dimension.hpp
index b2073e0..8eea034 100644
--- a/LiteLoader/include/llapi/mc/Dimension.hpp
+++ b/LiteLoader/include/llapi/mc/Dimension.hpp
@@ -14,6 +14,11 @@ public:
 
     DimensionHeightRange(short a):max(a){};
 };
+
+struct ActorBlockSyncMessage{
+    ActorUniqueID mEntityUniqueID;
+    char mMessage[4];
+};
 #undef BEFORE_EXTRA
 
 class Dimension {