diff --git a/AFNetworking/AFImageRequestOperation.m b/AFNetworking/AFImageRequestOperation.m
index 0a0390f..cfac8d9 100644
--- a/AFNetworking/AFImageRequestOperation.m
+++ b/AFNetworking/AFImageRequestOperation.m
@@ -75,7 +75,7 @@ static dispatch_queue_t image_request_operation_processing_queue() {
 										 success:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image))success
 										 failure:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error))failure
 {
-    AFImageRequestOperation *requestOperation = [[AFImageRequestOperation alloc] initWithRequest:urlRequest];
+    AFImageRequestOperation *requestOperation = [(AFImageRequestOperation *)[self alloc] initWithRequest:urlRequest];
     [requestOperation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
         if (success) {
             UIImage *image = responseObject;
@@ -106,7 +106,7 @@ static dispatch_queue_t image_request_operation_processing_queue() {
 										 success:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, NSImage *image))success
 										 failure:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error))failure
 {
-    AFImageRequestOperation *requestOperation = [[AFImageRequestOperation alloc] initWithRequest:urlRequest];
+    AFImageRequestOperation *requestOperation = [(AFImageRequestOperation *)[self alloc] initWithRequest:urlRequest];
     [requestOperation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
         if (success) {
             NSImage *image = responseObject;