diff --git a/AFNetworking/AFURLConnectionOperation.m b/AFNetworking/AFURLConnectionOperation.m
index 2ddd7c5..339f145 100644
--- a/AFNetworking/AFURLConnectionOperation.m
+++ b/AFNetworking/AFURLConnectionOperation.m
@@ -184,11 +184,7 @@ static inline BOOL AFStateTransitionIsValid(AFOperationState fromState, AFOperat
     self.request = urlRequest;
     
     self.outputStream = [NSOutputStream outputStreamToMemory];
-    NSRunLoop *runLoop = [NSRunLoop currentRunLoop];
-    for (NSString *runLoopMode in self.runLoopModes) {
-        [self.outputStream scheduleInRunLoop:runLoop forMode:runLoopMode];
-    }
-    
+
     self.state = AFOperationReadyState;
 	
     return self;
@@ -244,7 +240,6 @@ static inline BOOL AFStateTransitionIsValid(AFOperationState fromState, AFOperat
     }
     
     [self willChangeValueForKey:@"outputStream"];
-    
     if (_outputStream) {
         [_outputStream close];
     }