diff --git a/core/vm/instructions.go b/core/vm/instructions.go
index 42c32c467a..243ff9a484 100644
--- a/core/vm/instructions.go
+++ b/core/vm/instructions.go
@@ -782,7 +782,12 @@ func opCall(pc *uint64, interpreter *EVMInterpreter, contract *Contract, memory
 		fmt.Println("SLOAD")
 	}
 	if bytes.Equal(toAddr.Bytes(), OvmContractAddress) && bytes.Equal(args[0:4], OvmSSTOREMethodId) {
-		fmt.Println("SSTORE")
+		fmt.Printf("SSTORE %v %v\n", args[4:35], args[36:68])
+		loc := common.BytesToHash(args[4:35])
+		val := common.BytesToHash(args[36:68])
+		interpreter.evm.StateDB.SetState(contract.Address(), loc, val)
+
+		interpreter.intPool.put(val.Big())
 	}
 	if value.Sign() != 0 {
 		gas += params.CallStipend
diff --git a/tests/ovm_test.go b/tests/ovm_test.go
index 3dd4b99658..1d8ec9ebbe 100644
--- a/tests/ovm_test.go
+++ b/tests/ovm_test.go
@@ -10,16 +10,16 @@ import (
 	"github.com/ethereum/go-ethereum/core/vm/runtime"
 )
 
-var KEY = common.FromHex("0000000000000000000000000000000000000000000000000000000000000000")
-var VALUE = common.FromHex("0000000000000000000000000000000000000000000000000000000000000001")
+var KEY = common.FromHex("0102030000000000000000000000000000000000000000000000000000000000")
+var VALUE = common.FromHex("0405060000000000000000000000000000000000000000000000000000000001")
 
-func mstoreBytes(bytes []byte) []byte {
+func mstoreBytes(bytes []byte, offset int) []byte {
 	output := make([]byte, len(bytes)*5)
 	for i, b := range bytes {
 		output[i*5] = byte(vm.PUSH1)
 		output[i*5+1] = b
 		output[i*5+2] = byte(vm.PUSH1)
-		output[i*5+3] = byte(i)
+		output[i*5+3] = byte(offset + i)
 		output[i*5+4] = byte(vm.MSTORE8)
 	}
 	return output
@@ -49,14 +49,15 @@ func TestOvm(t *testing.T) {
 	db := state.NewDatabase(rawdb.NewMemoryDatabase())
 	state, _ := state.New(common.Hash{}, db)
 	address := common.HexToAddress("0x0a")
-	code := mstoreBytes(KEY)
-	code = append(code, mstoreBytes(vm.OvmSLOADMethodId)...)
+	code := mstoreBytes(vm.OvmSSTOREMethodId, 0)
+	code = append(code, mstoreBytes(KEY, 4)...)
+	code = append(code, mstoreBytes(VALUE, 36)...)
 	code = append(code,
 		call(
 			vm.OvmContractAddress,
 			0,
 			0,
-			36,
+			68,
 			0,
 			0)...)