diff --git a/AFNetworking/AFHTTPClient.h b/AFNetworking/AFHTTPClient.h
index 84d5965..296da7a 100644
--- a/AFNetworking/AFHTTPClient.h
+++ b/AFNetworking/AFHTTPClient.h
@@ -58,18 +58,6 @@ typedef enum {
     AFPropertyListParameterEncoding,
 } AFHTTPClientParameterEncoding;
 
-/**
- Returns a string, replacing certain characters with the equivalent percent escape sequence based on the specified encoding.
- 
- @param string The string to URL encode
- @param encoding The encoding to use for the replacement. If you are uncertain of the correct encoding, you should use UTF-8 (NSUTF8StringEncoding), which is the encoding designated by RFC 3986 as the correct encoding for use in URLs.
- 
- @discussion The characters escaped are all characters that are not legal URL characters (based on RFC 3986), including any whitespace, punctuation, or special characters.
- 
- @return A URL-encoded string. If it does not need to be modified (no percent escape sequences are missing), this function may merely return string argument.
- */
-extern NSString * AFURLEncodedStringFromStringWithEncoding(NSString *string, NSStringEncoding encoding);
-
 /**
  Returns a query string constructed by a set of parameters, using the specified encoding.