diff --git a/AFNetworking/AFHTTPRequestOperation.m b/AFNetworking/AFHTTPRequestOperation.m
index 890cb7f..2421710 100644
--- a/AFNetworking/AFHTTPRequestOperation.m
+++ b/AFNetworking/AFHTTPRequestOperation.m
@@ -237,10 +237,10 @@ static void AFSwizzleClassMethodWithClassAndSelectorUsingBlock(Class klass, SEL
 - (void)setCompletionBlockWithSuccess:(void (^)(AFHTTPRequestOperation *operation, id responseObject))success
                               failure:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failure
 {
-    // completion block is manually nilled out in AFURLConnectionOperation to break the retain cycle.
+    // completionBlock is manually nilled out in AFURLConnectionOperation to break the retain cycle.
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Warc-retain-cycles"
-    self.completionBlock = ^ {
+    self.completionBlock = ^{
         if ([self isCancelled]) {
             return;
         }