diff --git a/Code/Network/RKHTTPRequestOperation.m b/Code/Network/RKHTTPRequestOperation.m
index 03a729b4..c18e3d11 100644
--- a/Code/Network/RKHTTPRequestOperation.m
+++ b/Code/Network/RKHTTPRequestOperation.m
@@ -189,7 +189,7 @@ static void *RKHTTPRequestOperationStartDate = &RKHTTPRequestOperationStartDate;
 
 @end
 
-@interface AFURLConnectionOperation ()
+@interface AFURLConnectionOperation () <NSURLConnectionDataDelegate>
 @property (readwrite, nonatomic, strong) NSRecursiveLock *lock;
 @end