diff --git a/src/Handler/Utils/LMS.hs b/src/Handler/Utils/LMS.hs
index cb803a89d..56be1763b 100644
--- a/src/Handler/Utils/LMS.hs
+++ b/src/Handler/Utils/LMS.hs
@@ -161,7 +161,7 @@ lmsUserToResetTries LmsUser{..} = lmsUserResetTries && lmsUserLocked &&
 -- | Answers "Should the LMS lock a user out?"
 --   Note that LmsUserLocked only logs the current LMS state, not what it should be.
 lmsUserToLock :: LmsUser -> Bool
-lmsUserToLock LmsUser{..} = isNothing lmsUserStatus -- only open LMS should be accessible
+lmsUserToLock LmsUser{..} = isJust lmsUserStatus -- only open LMS should be accessible
 
 lmsUserStaff :: LmsUser -> Bool
 lmsUserStaff = const False -- legacy, currently ignored