diff --git a/core/state/database.go b/core/state/database.go
index c7b91c90c5..fb878b78c9 100644
--- a/core/state/database.go
+++ b/core/state/database.go
@@ -252,7 +252,7 @@ func (db *CachingDB) ReaderEIP7928(stateRoot common.Hash, accessList map[common.
 	pr := newPrefetchStateReader(r, accessList, threads)
 	if block {
 		if err := pr.Wait(); err != nil {
-			panic("wat do")
+			panic("unreachable")
 		}
 	}