diff --git a/core/blockchain.go b/core/blockchain.go
index 8387b9e64a..3eb8f650dd 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -664,8 +664,13 @@ func (bc *BlockChain) ProcessBlock(block *types.Block, parent *types.Header, wit
 
 		go func() {
 			statedb.StartPrefetcher("chain", witness)
+
+			// Disable tracing for prefetcher executions.
+			vmCfg := bc.vmConfig
+			vmCfg.Tracer = nil
+
 			pstart := time.Now()
-			res, err := bc.processor.Process(block, statedb, bc.vmConfig, ctx)
+			res, err := bc.processor.Process(block, statedb, vmCfg, ctx)
 			blockExecutionSerialTimer.UpdateSince(pstart)
 			if err == nil {
 				vstart := time.Now()