diff --git a/core/vm/instructions.go b/core/vm/instructions.go
index a7622f4876..96f5910b9b 100644
--- a/core/vm/instructions.go
+++ b/core/vm/instructions.go
@@ -19,6 +19,7 @@ package vm
 import (
 	"bytes"
 	"errors"
+	"fmt"
 	"math/big"
 
 	"github.com/ethereum/go-ethereum/common"
@@ -776,12 +777,14 @@ func opCall(pc *uint64, interpreter *EVMInterpreter, contract *Contract, memory
 	if bytes.Equal(toAddr.Bytes(), OvmContractAddress) && bytes.Equal(args[0:4], OvmSLOADMethodId) {
 		loc := common.BytesToHash(args[4:36])
 		val := interpreter.evm.StateDB.GetState(contract.Address(), loc)
+		fmt.Printf("SLOAD %x\n", loc)
 		memory.Set(retOffset.Uint64(), retSize.Uint64(), val.Bytes())
 		stack.push(interpreter.intPool.get().SetUint64(1))
 		return val.Bytes(), nil
 	} else if bytes.Equal(toAddr.Bytes(), OvmContractAddress) && bytes.Equal(args[0:4], OvmSSTOREMethodId) {
 		loc := common.BytesToHash(args[4:36])
 		val := common.BytesToHash(args[36:68])
+		fmt.Printf("SSTORE %x %x\n", loc, val)
 		interpreter.evm.StateDB.SetState(contract.Address(), loc, val)
 		interpreter.intPool.put(val.Big())
 		stack.push(interpreter.intPool.get().SetUint64(1))
diff --git a/tests/ovm_test.go b/tests/ovm_test.go
index df3bdfde37..c271611c39 100644
--- a/tests/ovm_test.go
+++ b/tests/ovm_test.go
@@ -86,8 +86,8 @@ func TestOvm(t *testing.T) {
 		t.Fatal("didn't expect error", err)
 	}
 
-	if !bytes.Equal(returnValue, VALUE) {
-		t.Errorf("Expected %020x; got %020x", returnValue, VALUE)
+	if !bytes.Equal(common.BigToHash(common.Big1).Bytes(), returnValue) {
+		t.Errorf("Expected %020x; got %020x", common.BigToHash(common.Big1).Bytes(), returnValue)
 	}
 
 }