diff --git a/php/OAuthSimple.php b/php/OAuthSimple.php
index 0f3671d..5212805 100644
--- a/php/OAuthSimple.php
+++ b/php/OAuthSimple.php
@@ -373,7 +373,9 @@ private static function _oauthEscape($string)
             throw new OAuthSimpleException('Array passed to _oauthEscape');
 		}
         $string = rawurlencode($string);
-		
+
+	//FIX: rawurlencode of ~ 
+       	$string = str_replace('%7E','~', $string);
        	$string = str_replace('+','%20',$string);
         $string = str_replace('!','%21',$string);
         $string = str_replace('*','%2A',$string);