diff --git a/core/vm/instructions.go b/core/vm/instructions.go
index ff78833ed9..023aa0af00 100644
--- a/core/vm/instructions.go
+++ b/core/vm/instructions.go
@@ -347,9 +347,7 @@ func opExtCodeSize(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext)
 }
 
 func opCodeSize(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
-	l := new(uint256.Int)
-	l.SetUint64(uint64(len(scope.Contract.Code)))
-	scope.Stack.push(l)
+	scope.Stack.push(new(uint256.Int).SetUint64(uint64(len(scope.Contract.Code))))
 	return nil, nil
 }