diff --git a/pkg/compiler/syscall.go b/pkg/compiler/syscall.go
index 26307270d..086112040 100644
--- a/pkg/compiler/syscall.go
+++ b/pkg/compiler/syscall.go
@@ -62,14 +62,15 @@ var syscalls = map[string]map[string]string{
 		"GetTransaction":      "Neo.Block.GetTransaction",
 	},
 	"transaction": {
-		"GetAttributes": "Neo.Transaction.GetAttributes",
-		"GetHash":       "Neo.Transaction.GetHash",
-		"GetInputs":     "Neo.Transaction.GetInputs",
-		"GetOutputs":    "Neo.Transaction.GetOutputs",
-		"GetReferences": "Neo.Transaction.GetReferences",
-		"GetScript":     "Neo.InvocationTransaction.GetScript",
-		"GetType":       "Neo.Transaction.GetType",
-		"GetWitnesses":  "Neo.Transaction.GetWitnesses",
+		"GetAttributes":   "Neo.Transaction.GetAttributes",
+		"GetHash":         "Neo.Transaction.GetHash",
+		"GetInputs":       "Neo.Transaction.GetInputs",
+		"GetOutputs":      "Neo.Transaction.GetOutputs",
+		"GetReferences":   "Neo.Transaction.GetReferences",
+		"GetScript":       "Neo.InvocationTransaction.GetScript",
+		"GetType":         "Neo.Transaction.GetType",
+		"GetUnspentCoins": "Neo.Transaction.GetUnspentCoins",
+		"GetWitnesses":    "Neo.Transaction.GetWitnesses",
 	},
 	"asset": {
 		"Create":       "Neo.Asset.Create",
diff --git a/pkg/interop/transaction/transaction.go b/pkg/interop/transaction/transaction.go
index 00d06c25e..e354d7baf 100644
--- a/pkg/interop/transaction/transaction.go
+++ b/pkg/interop/transaction/transaction.go
@@ -53,6 +53,12 @@ func GetReferences(t Transaction) []interface{} {
 	return []interface{}{}
 }
 
+// GetUnspentCoins returns a slice of not yet spent ouputs of a given transaction.
+// This function uses `Neo.Transaction.GetUnspentCoint` syscall.
+func GetUnspentCoins(t Transaction) []output.Output {
+	return []output.Output{}
+}
+
 // GetInputs returns a slice of inputs of a given Transaction. Refer to input
 // package on how to use them. This function uses `Neo.Transaction.GetInputs`
 // syscall.