diff --git a/pkg/compiler/syscall.go b/pkg/compiler/syscall.go
index b4ae7cd96..efd9c6daf 100644
--- a/pkg/compiler/syscall.go
+++ b/pkg/compiler/syscall.go
@@ -41,7 +41,7 @@ var syscalls = map[string]map[string]string{
 		"GetHeader":            "Neo.Blockchain.GetHeader",
 		"GetHeight":            "Neo.Blockchain.GetHeight",
 		"GetTransaction":       "System.Blockchain.GetTransaction",
-		"GetTransactionHeight": "Neo.Blockchain.GetTransactionHeight",
+		"GetTransactionHeight": "System.Blockchain.GetTransactionHeight",
 		"GetValidators":        "Neo.Blockchain.GetValidators",
 	},
 	"header": {
diff --git a/pkg/core/interop_system.go b/pkg/core/interop_system.go
index 7254177f4..8edb9fa4a 100644
--- a/pkg/core/interop_system.go
+++ b/pkg/core/interop_system.go
@@ -151,8 +151,9 @@ func bcGetTransaction(ic *interop.Context, v *vm.VM) error {
 // bcGetTransactionHeight returns transaction height.
 func bcGetTransactionHeight(ic *interop.Context, v *vm.VM) error {
 	_, h, err := getTransactionAndHeight(ic.DAO, v)
-	if err != nil {
-		return err
+	if err != nil || !isTraceableBlock(ic, h) {
+		v.Estack().PushVal(-1)
+		return nil
 	}
 	v.Estack().PushVal(h)
 	return nil
diff --git a/pkg/core/interops.go b/pkg/core/interops.go
index 091316dfe..14d6b8fee 100644
--- a/pkg/core/interops.go
+++ b/pkg/core/interops.go
@@ -112,7 +112,6 @@ var neoInterops = []interop.Function{
 	{Name: "Neo.Blockchain.GetContract", Func: bcGetContract, Price: 100},
 	{Name: "Neo.Blockchain.GetHeader", Func: bcGetHeader, Price: 100},
 	{Name: "Neo.Blockchain.GetHeight", Func: bcGetHeight, Price: 1},
-	{Name: "Neo.Blockchain.GetTransactionHeight", Func: bcGetTransactionHeight, Price: 100},
 	{Name: "Neo.Contract.Create", Func: contractCreate, Price: 0},
 	{Name: "Neo.Contract.Destroy", Func: contractDestroy, Price: 1},
 	{Name: "Neo.Contract.GetScript", Func: contractGetScript, Price: 1},
diff --git a/pkg/interop/blockchain/blockchain.go b/pkg/interop/blockchain/blockchain.go
index a18ff2ff6..fbe2bbe2d 100644
--- a/pkg/interop/blockchain/blockchain.go
+++ b/pkg/interop/blockchain/blockchain.go
@@ -67,7 +67,7 @@ func GetTransaction(hash []byte) Transaction {
 
 // GetTransactionHeight returns transaction's height (index of the block that
 // includes it) by the given ID (256 bit in BE format represented as a slice of
-// 32 bytes). This function uses `Neo.Blockchain.GetTransactionHeight` syscall.
+// 32 bytes). This function uses `System.Blockchain.GetTransactionHeight` syscall.
 func GetTransactionHeight(hash []byte) int {
 	return 0
 }