diff --git a/core/vm/instructions.go b/core/vm/instructions.go
index 3c004c1733..7e7d92e2e3 100644
--- a/core/vm/instructions.go
+++ b/core/vm/instructions.go
@@ -875,12 +875,13 @@ func makeLog(size int) executionFunc {
 func opPush1(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
 	var (
 		codeLen = uint64(len(scope.Contract.Code))
+		integer = new(uint256.Int)
 	)
 	*pc += 1
 	if *pc < codeLen {
-		scope.Stack.push(new(uint256.Int).SetUint64(uint64(scope.Contract.Code[*pc])))
+		scope.Stack.push(integer.SetUint64(uint64(scope.Contract.Code[*pc])))
 	} else {
-		scope.Stack.push(new(uint256.Int).Clear())
+		scope.Stack.push(integer.Clear())
 	}
 	return nil, nil
 }
@@ -888,9 +889,12 @@ func opPush1(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]by
 // make push instruction function
 func makePush(size uint64, pushByteSize int) executionFunc {
 	return func(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
-		codeLen := len(scope.Contract.Code)
-		startMin := min(codeLen, int(*pc+1))
-		endMin := min(startMin+pushByteSize, codeLen)
+		var (
+			codeLen  = len(scope.Contract.Code)
+			startMin = min(codeLen, int(*pc+1))
+			endMin   = min(startMin+pushByteSize, codeLen)
+		)
+
 		scope.Stack.push(new(uint256.Int).SetBytes(
 			common.RightPadBytes(
 				scope.Contract.Code[startMin:endMin],