diff --git a/src/Handler/Users.hs b/src/Handler/Users.hs
index e5ff76fea..c5968789f 100644
--- a/src/Handler/Users.hs
+++ b/src/Handler/Users.hs
@@ -101,7 +101,7 @@ getUsersR = do
                  | Set.null criterion -> eTrue -- TODO: why can this be eFalse and work still?
                  | otherwise          ->
                     --  (user E.^. UserMatrikelnummer) `E.in_` (E.valList $ Set.toList criterion)
-                     (user E.^. UserMatrikelnummer) `E.in_` (E.justList $ E.valList $ Set.toList criterion)
+                     user E.^. UserMatrikelnummer `E.in_` E.justList (E.valList $ Set.toList criterion)
             )
           , ( "school", FilterColumn $ \user criterion -> if
                 | Set.null criterion -> E.val True :: E.SqlExpr (E.Value Bool)
diff --git a/test/Database.hs b/test/Database.hs
index e13baca9b..2fc8a7dc5 100755
--- a/test/Database.hs
+++ b/test/Database.hs
@@ -41,7 +41,7 @@ argsDescr =
   , Option ['f'] ["fill"]    (NoArg DBFill)     "Fill database with example data"
   ]
 
-  
+
 main :: IO ()
 main = do
   args <- map unpack <$> getArgs
@@ -141,7 +141,7 @@ fillDb = do
   maxMuster <- insert User
     { userIdent  = "max@campus.lmu.de"
     , userAuthentication = AuthLDAP
-    , userMatrikelnummer = Nothing
+    , userMatrikelnummer = Just "1299"
     , userEmail  = "max@campus.lmu.de"
     , userDisplayName = "Max Musterstudent"
     , userSurname = "Musterstudent"
@@ -325,7 +325,7 @@ fillDb = do
     , sheetMarkingText = Nothing
     , sheetVisibleFrom = Just now
     , sheetActiveFrom = now
-    , sheetActiveTo = (14 * nominalDay) `addUTCTime` now 
+    , sheetActiveTo = (14 * nominalDay) `addUTCTime` now
     , sheetSubmissionMode = CorrectorSubmissions
     , sheetUploadMode = Upload True
     , sheetHintFrom = Nothing