diff --git a/AFNetworking/AFURLConnectionOperation.h b/AFNetworking/AFURLConnectionOperation.h
index 1a54a5c..b3a94db 100644
--- a/AFNetworking/AFURLConnectionOperation.h
+++ b/AFNetworking/AFURLConnectionOperation.h
@@ -320,9 +320,13 @@ NSCoding, NSCopying>
  The following constants are provided by `AFURLConnectionOperation` as possible SSL Pinning options.
 
  enum {
+ AFSSLPinningModeNone,
  AFSSLPinningModePublicKey,
  AFSSLPinningModeCertificate,
  }
+ 
+ `AFSSLPinningModeNone`
+ Do not pin SSL connections
 
  `AFSSLPinningModePublicKey`
  Pin SSL connections to certificate public key (SPKI).