diff --git a/miner/worker.go b/miner/worker.go
index f5627c9316..417a8dfc2d 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -276,7 +276,7 @@ func (self *worker) wait() {
 				}
 				go self.mux.Post(core.NewMinedBlockEvent{Block: block})
 			} else {
-				work.state.Commit()
+				state.Commit(work.state)
 				parent := self.chain.GetBlock(block.ParentHash(), block.NumberU64()-1)
 				if parent == nil {
 					glog.V(logger.Error).Infoln("Invalid block found during mining")