diff --git a/AFNetworking/AFHTTPRequestOperation.h b/AFNetworking/AFHTTPRequestOperation.h
index 235cc1a..7c3d234 100644
--- a/AFNetworking/AFHTTPRequestOperation.h
+++ b/AFNetworking/AFHTTPRequestOperation.h
@@ -107,3 +107,18 @@
                               failure:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failure;
 
 @end
+
+
+@interface AFHTTPRequestOperation (AFInternal)
+
+/**
+ Executes the successBlock on the corresponding successCallbackQueue.
+ */
+- (void)dispatchSuccessBlock:(void (^)(AFHTTPRequestOperation *operation, id responseObject))successBlock responseObject:(id)responseObject;
+
+/**
+ Executes the failureBlock on the corresponding failureCallbackQueue.
+ */
+- (void)dispatchFailureBlock:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failureBlock error:(NSError *)error;
+
+@end
\ No newline at end of file
diff --git a/AFNetworking/AFHTTPRequestOperation.m b/AFNetworking/AFHTTPRequestOperation.m
index 2fa2326..6f72918 100644
--- a/AFNetworking/AFHTTPRequestOperation.m
+++ b/AFNetworking/AFHTTPRequestOperation.m
@@ -127,17 +127,9 @@
         }
         
         if (self.error) {
-            if (failure) {
-                dispatch_async(self.failureCallbackQueue ? self.failureCallbackQueue : dispatch_get_main_queue(), ^{
-                    failure(self, self.error);
-                });
-            }
+            [self dispatchFailureBlock:failure error:self.error];
         } else {
-            if (success) {
-                dispatch_async(self.successCallbackQueue ? self.successCallbackQueue : dispatch_get_main_queue(), ^{
-                    success(self, self.responseData);
-                });
-            }
+            [self dispatchSuccessBlock:success responseObject:self.responseString];
         }
     };
 }
@@ -146,6 +138,25 @@
 
 + (BOOL)canProcessRequest:(NSURLRequest *)request {
     return YES;
-}     
+}
+
+#pragma mark - AFInternal
+
+- (void)dispatchSuccessBlock:(void (^)(AFHTTPRequestOperation *operation, id responseObject))successBlock responseObject:(id)responseObject {
+    if (successBlock) {
+        dispatch_async(self.successCallbackQueue ? self.successCallbackQueue : dispatch_get_main_queue(), ^{
+            successBlock(self, responseObject);
+        });
+    }
+}
+
+- (void)dispatchFailureBlock:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failureBlock error:(NSError *)error {
+    if (failureBlock) {
+        dispatch_async(self.failureCallbackQueue ? self.failureCallbackQueue : dispatch_get_main_queue(), ^{
+            failureBlock(self, error);
+        });
+
+    }
+}
 
 @end
diff --git a/AFNetworking/AFImageRequestOperation.m b/AFNetworking/AFImageRequestOperation.m
index d1f4d2b..554f6b7 100644
--- a/AFNetworking/AFImageRequestOperation.m
+++ b/AFNetworking/AFImageRequestOperation.m
@@ -230,17 +230,9 @@ static dispatch_queue_t image_request_operation_processing_queue() {
         
         dispatch_async(image_request_operation_processing_queue(), ^(void) {
             if (self.error) {
-                if (failure) {
-                    dispatch_async(self.failureCallbackQueue ? self.failureCallbackQueue : dispatch_get_main_queue(), ^{
-                        failure(self, self.error);
-                    });
-                }
-            } else {                
-                if (success) {
-                    dispatch_async(self.successCallbackQueue ? self.successCallbackQueue : dispatch_get_main_queue(), ^{
-                        success(self, self.responseImage);
-                    });
-                }
+                [self dispatchFailureBlock:failure error:self.error];
+            } else {            
+                [self dispatchSuccessBlock:success responseObject:self.responseImage];
             }
         });        
     };  
diff --git a/AFNetworking/AFJSONRequestOperation.m b/AFNetworking/AFJSONRequestOperation.m
index cc7d661..07e6113 100644
--- a/AFNetworking/AFJSONRequestOperation.m
+++ b/AFNetworking/AFJSONRequestOperation.m
@@ -134,17 +134,9 @@ static dispatch_queue_t json_request_operation_processing_queue() {
                 id JSON = self.responseJSON;
                 
                 if (self.JSONError) {
-                    if (failure) {
-                        dispatch_async(self.failureCallbackQueue ? self.failureCallbackQueue : dispatch_get_main_queue(), ^{
-                            failure(self, self.JSONError);
-                        }); 
-                    }
+                    [self dispatchFailureBlock:failure error:self.JSONError];
                 } else {
-                    if (success) {
-                        dispatch_async(self.successCallbackQueue ? self.successCallbackQueue : dispatch_get_main_queue(), ^{
-                            success(self, JSON);
-                        });
-                    }
+                    [self dispatchSuccessBlock:success responseObject:JSON];
                 }
             });
         }
diff --git a/AFNetworking/AFPropertyListRequestOperation.m b/AFNetworking/AFPropertyListRequestOperation.m
index 0fcade0..b65692e 100644
--- a/AFNetworking/AFPropertyListRequestOperation.m
+++ b/AFNetworking/AFPropertyListRequestOperation.m
@@ -124,26 +124,16 @@ static dispatch_queue_t property_list_request_operation_processing_queue() {
         }
         
         if (self.error) {
-            if (failure) {
-                dispatch_async(self.failureCallbackQueue ? self.failureCallbackQueue : dispatch_get_main_queue(), ^{
-                    failure(self, self.error);
-                });
-            }
+            [self dispatchFailureBlock:failure error:self.error];
         } else {
             dispatch_async(property_list_request_operation_processing_queue(), ^(void) {
                 id propertyList = self.responsePropertyList;
-
-                dispatch_async(self.successCallbackQueue ? self.successCallbackQueue : dispatch_get_main_queue(), ^{
-                    if (self.propertyListError) {
-                        if (failure) {
-                            failure(self, self.propertyListError);
-                        }
-                    } else {
-                        if (success) {
-                            success(self, propertyList);
-                        }
-                    }
-                }); 
+                
+                if (self.propertyListError) {
+                    [self dispatchFailureBlock:failure error:self.propertyListError];
+                }else {
+                    [self dispatchSuccessBlock:success responseObject:propertyList];
+                }
             });
         }
     };    
diff --git a/AFNetworking/AFXMLRequestOperation.m b/AFNetworking/AFXMLRequestOperation.m
index ee7865a..f3966c4 100644
--- a/AFNetworking/AFXMLRequestOperation.m
+++ b/AFNetworking/AFXMLRequestOperation.m
@@ -187,17 +187,9 @@ static dispatch_queue_t xml_request_operation_processing_queue() {
         }
         
         if (self.error) {
-            if (failure) {
-                dispatch_async(self.failureCallbackQueue ? self.failureCallbackQueue : dispatch_get_main_queue(), ^{
-                    failure(self, self.error);
-                });
-            }
+            [self dispatchFailureBlock:failure error:self.error];
         } else {
-            if (success) {
-                dispatch_async(self.successCallbackQueue ? self.successCallbackQueue : dispatch_get_main_queue(), ^{
-                    success(self, self.responseXMLParser);
-                });
-            }
+            [self dispatchSuccessBlock:success responseObject:self.responseXMLParser];
         }
     };    
 }