diff --git a/AFNetworking/AFXMLRequestOperation.h b/AFNetworking/AFXMLRequestOperation.h
index 10a0f89..197e1c2 100644
--- a/AFNetworking/AFXMLRequestOperation.h
+++ b/AFNetworking/AFXMLRequestOperation.h
@@ -50,7 +50,7 @@
  */
 @property (readonly, nonatomic) NSXMLParser *responseXMLParser;
 
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
+#ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
 /**
  An `NSXMLDocument` object constructed from the response data. If an error occurs while parsing, `nil` will be returned, and the `error` property will be set to the error.
  */
@@ -71,7 +71,7 @@
                                                         failure:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, NSXMLParser *XMLParse))failure;
 
 
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
+#ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
 /**
  Creates and returns an `AFXMLRequestOperation` object and sets the specified success and failure callbacks.
  
diff --git a/AFNetworking/AFXMLRequestOperation.m b/AFNetworking/AFXMLRequestOperation.m
index bdc935c..2efaba6 100644
--- a/AFNetworking/AFXMLRequestOperation.m
+++ b/AFNetworking/AFXMLRequestOperation.m
@@ -35,7 +35,7 @@ static dispatch_queue_t xml_request_operation_processing_queue() {
 
 @interface AFXMLRequestOperation ()
 @property (readwrite, nonatomic) NSXMLParser *responseXMLParser;
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
+#ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
 @property (readwrite, nonatomic, retain) NSXMLDocument *responseXMLDocument;
 #endif
 @property (readwrite, nonatomic) NSError *XMLError;
@@ -43,7 +43,7 @@ static dispatch_queue_t xml_request_operation_processing_queue() {
 
 @implementation AFXMLRequestOperation
 @synthesize responseXMLParser = _responseXMLParser;
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
+#ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
 @synthesize responseXMLDocument = _responseXMLDocument;
 #endif
 @synthesize XMLError = _XMLError;
@@ -66,7 +66,7 @@ static dispatch_queue_t xml_request_operation_processing_queue() {
     return requestOperation;
 }
 
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
+#ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
 + (AFXMLRequestOperation *)XMLDocumentRequestOperationWithRequest:(NSURLRequest *)urlRequest
                                                           success:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, NSXMLDocument *document))success
                                                           failure:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, NSXMLDocument *document))failure
@@ -97,7 +97,7 @@ static dispatch_queue_t xml_request_operation_processing_queue() {
     return _responseXMLParser;
 }
 
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
+#ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
 - (NSXMLDocument *)responseXMLDocument {
     if (!_responseXMLDocument && [self.responseData length] > 0 && [self isFinished]) {
         NSError *error = nil;