diff --git a/core/state/statedb.go b/core/state/statedb.go
index 14e4456830..8bec4f675c 100644
--- a/core/state/statedb.go
+++ b/core/state/statedb.go
@@ -847,6 +847,14 @@ func (s *StateDB) IntermediateRoot(deleteEmptyObjects bool) common.Hash {
 		start   = time.Now()
 		workers errgroup.Group
 	)
+	if s.db.TrieDB().IsVerkle() {
+		// Whilst MPT storage tries are independent, Verkle has one single trie
+		// for all the accounts and all the storage slots merged together. The
+		// former can thus be simply parallelized, but updating the latter will
+		// need concurrency support within the trie itself. That's a TODO for a
+		// later time.
+		workers.SetLimit(1)
+	}
 	for addr, op := range s.mutations {
 		if op.applied || op.isDelete() {
 			continue
diff --git a/core/state/trie_prefetcher.go b/core/state/trie_prefetcher.go
index 63816ceecc..12e29a3551 100644
--- a/core/state/trie_prefetcher.go
+++ b/core/state/trie_prefetcher.go
@@ -32,10 +32,6 @@ var (
 	// errTerminated is returned if a fetcher is attempted to be operated after it
 	// has already terminated.
 	errTerminated = errors.New("fetcher is already terminated")
-
-	// errNotTerminated is returned if a fetchers data is attempted to be retrieved
-	// before it terminates.
-	errNotTerminated = errors.New("fetcher is not yet terminated")
 )
 
 // triePrefetcher is an active prefetcher, which receives accounts or storage