diff --git a/contracts/cluster_proxy/src/entry.rs b/contracts/cluster_proxy/src/entry.rs
index 03064cb..0bb58c3 100644
--- a/contracts/cluster_proxy/src/entry.rs
+++ b/contracts/cluster_proxy/src/entry.rs
@@ -70,7 +70,7 @@ fn process_transfer() -> Result<(), Error> {
         return Err(Error::SporeActionMismatch);
     };
     if input_data.as_slice() != transfer.cluster_id().as_slice()
-        || load_type_args(0, GroupInput).as_ref() != transfer.proxy_id().as_slice()
+        || load_type_args(0, GroupInput)[..32] != transfer.proxy_id().as_slice()
     {
         return Err(Error::SporeActionFieldMismatch);
     }