diff --git a/AFNetworking/AFJSONRequestOperation.m b/AFNetworking/AFJSONRequestOperation.m
index e12e2dc..a4e56d2 100644
--- a/AFNetworking/AFJSONRequestOperation.m
+++ b/AFNetworking/AFJSONRequestOperation.m
@@ -65,9 +65,7 @@ static dispatch_queue_t json_request_operation_processing_queue() {
             }
         } else {
             dispatch_async(json_request_operation_processing_queue(), ^(void) {
-                NSError *error = nil;
                 id JSON = operation.responseJSON;
-                operation.error = error;
                 
                 dispatch_async(dispatch_get_main_queue(), ^(void) {
                     if (operation.error) {
diff --git a/AFNetworking/AFXMLRequestOperation.m b/AFNetworking/AFXMLRequestOperation.m
index f2aec27..26ff4b1 100644
--- a/AFNetworking/AFXMLRequestOperation.m
+++ b/AFNetworking/AFXMLRequestOperation.m
@@ -70,7 +70,9 @@ static dispatch_queue_t xml_request_operation_processing_queue() {
         } else {
             NSXMLParser *XMLParser = operation.responseXMLParser;
             if (success) {
-                success(operation.request, operation.response, XMLParser);
+                dispatch_async(dispatch_get_main_queue(), ^(void) {
+                    success(operation.request, operation.response, XMLParser);
+                });
             }
         }
     };