diff --git a/src/NJsonSchema/JsonSchema4.cs b/src/NJsonSchema/JsonSchema4.cs
index e9a230b91..bb9576bce 100644
--- a/src/NJsonSchema/JsonSchema4.cs
+++ b/src/NJsonSchema/JsonSchema4.cs
@@ -756,6 +756,7 @@ public bool InheritsSchema(JsonSchema4 parentSchema)
/// Validates the given JSON data against this schema.
/// The JSON data to validate.
+ /// Could not deserialize the JSON data.
/// The collection of validation errors.
public ICollection Validate(string jsonData)
{
diff --git a/src/NJsonSchema/Validation/JsonSchemaValidator.cs b/src/NJsonSchema/Validation/JsonSchemaValidator.cs
index 8685eef01..fef54ee29 100644
--- a/src/NJsonSchema/Validation/JsonSchemaValidator.cs
+++ b/src/NJsonSchema/Validation/JsonSchemaValidator.cs
@@ -11,6 +11,7 @@
using System.Globalization;
using System.Linq;
using System.Text.RegularExpressions;
+using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
namespace NJsonSchema.Validation
@@ -21,6 +22,7 @@ public class JsonSchemaValidator
/// Validates the given JSON data.
/// The json data.
/// The schema.
+ /// Could not deserialize the JSON data.
/// The list of validation errors.
public ICollection Validate(string jsonData, JsonSchema4 schema)
{