diff --git a/Src/Newtonsoft.Json/JsonSerializer.cs b/Src/Newtonsoft.Json/JsonSerializer.cs
index 9e89733d..4db23a49 100644
--- a/Src/Newtonsoft.Json/JsonSerializer.cs
+++ b/Src/Newtonsoft.Json/JsonSerializer.cs
@@ -389,7 +389,7 @@ namespace Newtonsoft.Json
     {
       Type converterType;
 
-      if (!ConverterTypeCache.ContainsKey(attributeProvider))
+      if (!ConverterTypeCache.TryGetValue(attributeProvider, out converterType))
       {
         JsonConverterAttribute converterAttribute = ReflectionUtils.GetAttribute<JsonConverterAttribute>(attributeProvider, true);
         converterType = (converterAttribute != null)
@@ -398,10 +398,6 @@ namespace Newtonsoft.Json
 
         ConverterTypeCache[attributeProvider] = converterType;
       }
-      else
-      {
-        converterType = ConverterTypeCache[attributeProvider];
-      }
 
       if (converterType != null)
       {