diff --git a/core/state/state_object.go b/core/state/state_object.go
index 707e42dbaa..6444690727 100644
--- a/core/state/state_object.go
+++ b/core/state/state_object.go
@@ -74,7 +74,6 @@ type stateObject struct {
 	originStorage  Storage // Storage cache of original entries to dedup rewrites
 	pendingStorage Storage // Storage entries that need to be flushed to disk, at the end of an entire block
 	dirtyStorage   Storage // Storage entries that have been modified in the current transaction execution, reset for every transaction
-	readStorage []common.Hash
 
 	// Cache flags.
 	dirtyCode bool // true if the code was updated
@@ -112,7 +111,6 @@ func newObject(db *StateDB, address common.Address, acct *types.StateAccount) *s
 		originStorage:  make(Storage),
 		pendingStorage: make(Storage),
 		dirtyStorage:   make(Storage),
-		readStorage:    []common.Hash{},
 	}
 }
 
@@ -259,22 +257,12 @@ func (s *stateObject) finalise(prefetch bool) {
 		}
 	}
 
-	// prefetch slots that are read so that they will appear in witness
-	for _, value := range s.readStorage {
-		if _, ok := s.dirtyStorage[value]; !ok {
-			slotsToPrefetch = append(slotsToPrefetch, common.CopyBytes(value[:]))
-		}
-	}
-
 	if s.db.prefetcher != nil && prefetch && len(slotsToPrefetch) > 0 && s.data.Root != types.EmptyRootHash {
 		s.db.prefetcher.prefetch(s.addrHash, s.data.Root, s.address, slotsToPrefetch)
 	}
 	if len(s.dirtyStorage) > 0 {
 		s.dirtyStorage = make(Storage)
 	}
-	if len(s.readStorage) > 0 {
-		s.readStorage = []common.Hash{}
-	}
 }
 
 // updateTrie is responsible for persisting cached storage changes into the