diff --git a/README.md b/README.md
index 952c22c..eb1232a 100644
--- a/README.md
+++ b/README.md
@@ -71,7 +71,7 @@ func main() {
 
     database := ipfsethdb.NewDatabase(ipfsNode.Blocks)
     stateDatabase := state.NewDatabase(database)
-    stateDB, _ := state.New(common.Hash{}, stateDatabase, nil)
+    stateDB, _ := state.New(common.Hash{}, stateDatabase)
     stateDBNodeIterator := state.NewNodeIterator(stateDB)
     // do stuff with the statedb node iterator
 }
diff --git a/postgres/doc.md b/postgres/doc.md
index 1e8f1b9..504fcde 100644
--- a/postgres/doc.md
+++ b/postgres/doc.md
@@ -33,7 +33,7 @@ func main() {
 
     database := pgipfsethdb.NewDatabase(db)
     stateDatabase := state.NewDatabase(database)
-    stateDB, _ := state.New(common.Hash{}, stateDatabase, nil)
+    stateDB, _ := state.New(common.Hash{}, stateDatabase)
     stateDBNodeIterator := state.NewNodeIterator(stateDB)
     // do stuff with the statedb node iterator
 }