Index: SoObjects/SOGo/SOGoUserManager.m
--- SoObjects/SOGo/SOGoUserManager.m.orig
+++ SoObjects/SOGo/SOGoUserManager.m
@@ -1401,7 +1401,7 @@ static const NSString *kObfuscatedSecondaryEmailKey = 
   NSDictionary *info, *data;
   SOGoSystemDefaults *sd;
   NSString *uid, *suffix;
-  NSMutableString *obfuscatedSecondaryEmail;
+  NSString *obfuscatedSecondaryEmail;
   NSInteger i, j;
   NSRange range;
 
