diff --git a/source/java/org/alfresco/repo/security/authentication/RepositoryAuthenticationDao.java b/source/java/org/alfresco/repo/security/authentication/RepositoryAuthenticationDao.java
index 8d9ca82c6b..baa90beb8f 100644
--- a/source/java/org/alfresco/repo/security/authentication/RepositoryAuthenticationDao.java
+++ b/source/java/org/alfresco/repo/security/authentication/RepositoryAuthenticationDao.java
@@ -108,7 +108,7 @@ public class RepositoryAuthenticationDao implements MutableAuthenticationDao
             DataAccessException
     {
         String userName = userNamesAreCaseSensitive ? caseSensitiveUserName : caseSensitiveUserName.toLowerCase();
-        NodeRef userRef = getUserOrNull(userNamesAreCaseSensitive ? userName : userName.toLowerCase());
+        NodeRef userRef = getUserOrNull(userName);
         if (userRef == null)
         {
             throw new UsernameNotFoundException("Could not find user by userName: " + caseSensitiveUserName);