diff --git a/AFNetworking/AFRestClient.m b/AFNetworking/AFRestClient.m
index d699e59..7b94409 100644
--- a/AFNetworking/AFRestClient.m
+++ b/AFNetworking/AFRestClient.m
@@ -60,9 +60,6 @@ static NSStringEncoding const kAFRestClientStringEncoding = NSUTF8StringEncoding
 	// User-Agent Header; see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.43
 	[self setDefaultHeader:@"User-Agent" value:[NSString stringWithFormat:@"%@/%@ (%@, %@ %@, %@, Scale/%f)", [[[NSBundle mainBundle] infoDictionary] objectForKey:(NSString *)kCFBundleIdentifierKey], [[[NSBundle mainBundle] infoDictionary] objectForKey:(NSString *)kCFBundleVersionKey], @"unknown", [[UIDevice currentDevice] systemName], [[UIDevice currentDevice] systemVersion], [[UIDevice currentDevice] model], ([[UIScreen mainScreen] respondsToSelector:@selector(scale)] ? [[UIScreen mainScreen] scale] : 1.0)]];
     
-    // X-UDID HTTP Header
-	[self setDefaultHeader:@"X-UDID" value:[[UIDevice currentDevice] uniqueIdentifier]];
-    
     return self;
 }