diff --git a/core/vm/instructions_test.go b/core/vm/instructions_test.go
index 88107a69c4..1f63d2b040 100644
--- a/core/vm/instructions_test.go
+++ b/core/vm/instructions_test.go
@@ -532,12 +532,14 @@ func TestOpMstore(t *testing.T) {
 	mem.Resize(64)
 	pc := uint64(0)
 	v := "abcdef00000000000000abba000000000deaf000000c0de00100000000133700"
-	stack.pushN(*new(uint256.Int).SetBytes(common.Hex2Bytes(v)), *new(uint256.Int))
+	stack.push(new(uint256.Int).SetBytes(common.Hex2Bytes(v)))
+	stack.push(new(uint256.Int))
 	opMstore(&pc, evmInterpreter, &callCtx{mem, stack, nil})
 	if got := common.Bytes2Hex(mem.GetCopy(0, 32)); got != v {
 		t.Fatalf("Mstore fail, got %v, expected %v", got, v)
 	}
-	stack.pushN(*new(uint256.Int).SetUint64(0x1), *new(uint256.Int))
+	stack.push(new(uint256.Int).SetUint64(0x1))
+	stack.push(new(uint256.Int))
 	opMstore(&pc, evmInterpreter, &callCtx{mem, stack, nil})
 	if common.Bytes2Hex(mem.GetCopy(0, 32)) != "0000000000000000000000000000000000000000000000000000000000000001" {
 		t.Fatalf("Mstore failed to overwrite previous value")
@@ -560,7 +562,8 @@ func BenchmarkOpMstore(bench *testing.B) {
 
 	bench.ResetTimer()
 	for i := 0; i < bench.N; i++ {
-		stack.pushN(*value, *memStart)
+		stack.push(value)
+		stack.push(memStart)
 		opMstore(&pc, evmInterpreter, &callCtx{mem, stack, nil})
 	}
 }
@@ -579,7 +582,8 @@ func BenchmarkOpKeccak256(bench *testing.B) {
 
 	bench.ResetTimer()
 	for i := 0; i < bench.N; i++ {
-		stack.pushN(*uint256.NewInt(32), *start)
+		stack.push(uint256.NewInt(32))
+		stack.push(start)
 		opKeccak256(&pc, evmInterpreter, &callCtx{mem, stack, nil})
 	}
 }
diff --git a/core/vm/stack.go b/core/vm/stack.go
index 2367da1d7c..cc6037f23b 100644
--- a/core/vm/stack.go
+++ b/core/vm/stack.go
@@ -42,10 +42,6 @@ func (st *Stack) push(d *uint256.Int) {
 	// NOTE push limit (1024) is checked in baseCheck
 	st.data = append(st.data, *d)
 }
-func (st *Stack) pushN(ds ...uint256.Int) {
-	// FIXME: Is there a way to pass args by pointers.
-	st.data = append(st.data, ds...)
-}
 
 func (st *Stack) pop() (ret uint256.Int) {
 	ret = st.data[len(st.data)-1]