diff --git a/common/uint160.go b/common/uint160.go
index b7396308..fe816c52 100644
--- a/common/uint160.go
+++ b/common/uint160.go
@@ -89,7 +89,7 @@ func IsValidHexAddr(s []byte) bool {
 	return false
 }
 
-func (f *Uint160) MarshalJSON() ([]byte, error) {
+func (f Uint160) MarshalJSON() ([]byte, error) {
 	str, err := f.ToAddress()
 	return []byte("\"" + str + "\""), err
 }
diff --git a/common/uint160_test.go b/common/uint160_test.go
index cb54012d..ed8f0d31 100644
--- a/common/uint160_test.go
+++ b/common/uint160_test.go
@@ -2,6 +2,7 @@ package common
 
 import (
 	"encoding/hex"
+	"encoding/json"
 	"testing"
 )
 
@@ -23,7 +24,16 @@ func TestMarshalJSON(t *testing.T) {
 	// Expected value after Marshalling
 	expected := []byte(NKNADDRESS)
 
-	bytes, err := f.MarshalJSON()
+	bytes, err := json.Marshal(f)
+	if err != nil {
+		t.Fatalf("Unexpected error: %v", err)
+	}
+
+	if !bytesEqual(bytes, expected) {
+		t.Fatalf("Expected %v, got %v", expected, bytes)
+	}
+
+	bytes, err = json.Marshal(*f)
 	if err != nil {
 		t.Fatalf("Unexpected error: %v", err)
 	}