diff --git a/Src/Newtonsoft.Json.Tests/Converters/DiscriminatedUnionConverterTests.cs b/Src/Newtonsoft.Json.Tests/Converters/DiscriminatedUnionConverterTests.cs
index fb0c7051..3e586218 100644
--- a/Src/Newtonsoft.Json.Tests/Converters/DiscriminatedUnionConverterTests.cs
+++ b/Src/Newtonsoft.Json.Tests/Converters/DiscriminatedUnionConverterTests.cs
@@ -252,7 +252,7 @@ namespace Newtonsoft.Json.Tests.Converters
         [Test]
         public void DeserializeBasicUnion_MismatchedFieldCount()
         {
-            ExceptionAssert.Throws<JsonSerializationException>(() => JsonConvert.DeserializeObject<Currency>(@"{""Case"":""AUD"",""Fields"":[1]}"), "The number of field values does not match the number of properties definied by union 'AUD'. Path '', line 1, position 27.");
+            ExceptionAssert.Throws<JsonSerializationException>(() => JsonConvert.DeserializeObject<Currency>(@"{""Case"":""AUD"",""Fields"":[1]}"), "The number of field values does not match the number of properties defined by union 'AUD'. Path '', line 1, position 27.");
         }
 
         [Test]
diff --git a/Src/Newtonsoft.Json/Converters/DiscriminatedUnionConverter.cs b/Src/Newtonsoft.Json/Converters/DiscriminatedUnionConverter.cs
index bffaba88..679a8324 100644
--- a/Src/Newtonsoft.Json/Converters/DiscriminatedUnionConverter.cs
+++ b/Src/Newtonsoft.Json/Converters/DiscriminatedUnionConverter.cs
@@ -214,7 +214,7 @@ namespace Newtonsoft.Json.Converters
             {
                 if (caseInfo.Fields.Length != fields.Count)
                 {
-                    throw JsonSerializationException.Create(reader, "The number of field values does not match the number of properties definied by union '{0}'.".FormatWith(CultureInfo.InvariantCulture, caseName));
+                    throw JsonSerializationException.Create(reader, "The number of field values does not match the number of properties defined by union '{0}'.".FormatWith(CultureInfo.InvariantCulture, caseName));
                 }
 
                 for (int i = 0; i < fields.Count; i++)