diff --git a/zk/utils/utils.go b/zk/utils/utils.go
index 5d4038337f4..3376b863c61 100644
--- a/zk/utils/utils.go
+++ b/zk/utils/utils.go
@@ -153,6 +153,7 @@ func GetBatchLocalExitRootFromSCStorage(batchNo uint64, db DbReader, tx kv.Tx) (
 		}
 
 		stateReader := state.NewPlainState(tx, blockNo+1, systemcontracts.SystemContractCodeLookup["hermez"])
+		defer stateReader.Close()
 		rawLer, err := stateReader.ReadAccountStorage(state.GER_MANAGER_ADDRESS, 1, &state.GLOBAL_EXIT_ROOT_POS_1)
 		if err != nil {
 			return libcommon.Hash{}, err