diff --git a/core/state/transient_storage.go b/core/state/transient_storage.go
index 8b5ae67fd5..f55c694af4 100644
--- a/core/state/transient_storage.go
+++ b/core/state/transient_storage.go
@@ -79,7 +79,7 @@ func (t transientStorage) PrettyPrint() string {
 	for _, addr := range sortedAddrs {
 		fmt.Fprintf(out, "%#x:", addr)
 		storage := t[addr]
-		sortedKeys = make([]common.Hash, 0, len(storage))
+		sortedKeys := make([]common.Hash, 0, len(storage))
 		for key := range storage {
 			sortedKeys = append(sortedKeys, key)
 		}