diff --git a/core/chain_makers.go b/core/chain_makers.go
index a097925b89..2afa89fdc9 100644
--- a/core/chain_makers.go
+++ b/core/chain_makers.go
@@ -403,13 +403,7 @@ func GenerateChainWithGenesis(genesis *Genesis, engine consensus.Engine, n int,
 }
 
 func (cm *chainMaker) makeHeader(parent *types.Block, state *state.StateDB, engine consensus.Engine) *types.Header {
-	var time uint64
-	if parent.Time() == 0 {
-		time = 10
-	} else {
-		time = parent.Time() + 10 // block time is fixed at 10 seconds
-	}
-
+	time := parent.Time() + 10 // block time is fixed at 10 seconds
 	header := &types.Header{
 		Root:       state.IntermediateRoot(cm.config.IsEIP158(parent.Number())),
 		ParentHash: parent.Hash(),