diff --git a/src/Handler/Utils/Users.hs b/src/Handler/Utils/Users.hs
index edf68ba4f..c667fa53e 100644
--- a/src/Handler/Utils/Users.hs
+++ b/src/Handler/Utils/Users.hs
@@ -40,14 +40,14 @@ guessUser :: Set GuessUserInfo -> DB (Maybe UserId)
 guessUser (Set.toList -> criteria) = $cachedHereBinary criteria $ go False
   where
     toSql user = \case
-      GuessUserMatrikelnummer userMatriculation' -> user E.^. UserMatrikelnummer E.==. E.val (Just userMatriculation')
-      GuessUserDisplayName    userDisplayName'   -> user E.^. UserDisplayName `E.hasInfix` E.val userDisplayName'
-      GuessUserSurname        userSurname'       -> user E.^. UserSurname `E.hasInfix` E.val userSurname'
-      GuessUserFirstName      userFirstName'     -> user E.^. UserFirstName `E.hasInfix` E.val userFirstName'
+      GuessUserMatrikelnummer userMatriculation' -> user E.^. UserMatrikelnummer  E.==.       E.val (Just userMatriculation')
+      GuessUserDisplayName    userDisplayName'   -> user E.^. UserDisplayName    `E.hasInfix` E.val userDisplayName'
+      GuessUserSurname        userSurname'       -> user E.^. UserSurname        `E.hasInfix` E.val userSurname'
+      GuessUserFirstName      userFirstName'     -> user E.^. UserFirstName      `E.hasInfix` E.val userFirstName'
 
     go didLdap = do
       let retrieveUsers = E.select . E.from $ \user -> do
-            E.where_ . E.or $ map (toSql user) criteria 
+            E.where_ . E.and $ map (toSql user) criteria 
             return user
       users <- retrieveUsers
       let users' = reverse $ sortBy closeness users