diff --git a/docs/en/MonoMac.Foundation/NSJsonSerialization.xml b/docs/en/MonoMac.Foundation/NSJsonSerialization.xml
index 2836b18f5..eb3a88b4e 100644
--- a/docs/en/MonoMac.Foundation/NSJsonSerialization.xml
+++ b/docs/en/MonoMac.Foundation/NSJsonSerialization.xml
@@ -116,7 +116,7 @@ public class MyClass : BaseClass {
       </Docs>
     </Member>
     <Member MemberName="Deserialize">
-      <MemberSignature Language="C#" Value="public static MonoMac.Foundation.NSObject Deserialize (MonoMac.Foundation.NSData data, MonoMac.Foundation.NSJsonReadingOptions opt, MonoMac.Foundation.NSError error);" />
+      <MemberSignature Language="C#" Value="public static MonoMac.Foundation.NSObject Deserialize (MonoMac.Foundation.NSData data, MonoMac.Foundation.NSJsonReadingOptions opt, out MonoMac.Foundation.NSError error);" />
       <MemberSignature Language="ILAsm" Value=".method public static hidebysig class MonoMac.Foundation.NSObject Deserialize(class MonoMac.Foundation.NSData data, valuetype MonoMac.Foundation.NSJsonReadingOptions opt, class MonoMac.Foundation.NSError error) cil managed" />
       <MemberType>Method</MemberType>
       <AssemblyInfo>
@@ -133,7 +133,7 @@ public class MyClass : BaseClass {
       <Parameters>
         <Parameter Name="data" Type="MonoMac.Foundation.NSData" />
         <Parameter Name="opt" Type="MonoMac.Foundation.NSJsonReadingOptions" />
-        <Parameter Name="error" Type="MonoMac.Foundation.NSError" />
+        <Parameter Name="error" Type="MonoMac.Foundation.NSError&amp;" RefType="out" />
       </Parameters>
       <Docs>
         <param name="data">To be added.</param>