diff --git a/frontend/src/utils/alerts/alert-icons.js b/frontend/src/utils/alerts/alert-icons.js
index eb497d9bd..434d98568 100644
--- a/frontend/src/utils/alerts/alert-icons.js
+++ b/frontend/src/utils/alerts/alert-icons.js
@@ -15,6 +15,6 @@ export const ALERT_ICONS = {
   info: '"\\f05a"',
   registered: '"\\f274"',
   userplus: '"\\f234"',
-  userslash: '"\\f504"',
+  userslash: '"\\f506"',
   warning: '"\\f071"',
 };
diff --git a/src/Handler/Course.hs b/src/Handler/Course.hs
index 141824f9d..b978c75f3 100644
--- a/src/Handler/Course.hs
+++ b/src/Handler/Course.hs
@@ -557,11 +557,11 @@ postCRegisterR tid ssh csh = do
   formResult regResult $ \(mbSfId,codeOk) -> if
       | isRegistered -> do
           runDB $ deleteBy $ UniqueParticipant aid cid
-          addMessageI Info MsgCourseDeregisterOk
+          addMessageIconI Info IconEnrolFalse MsgCourseDeregisterOk
       | codeOk -> do
           actTime <- liftIO getCurrentTime
           regOk <- runDB $ insertUnique $ CourseParticipant cid aid actTime mbSfId
-          when (isJust regOk) $ addMessageI Success MsgCourseRegisterOk
+          when (isJust regOk) $ addMessageIconI Success IconEnrolTrue MsgCourseRegisterOk
       | otherwise -> addMessageI Warning MsgCourseSecretWrong
   -- addMessage Info $ toHtml $ show regResult -- For debugging only
   redirect $ CourseR tid ssh csh CShowR
@@ -1418,7 +1418,7 @@ postCUserR tid ssh csh uCId = do
       | Just (Entity pId _) <- mRegistration
         -> do
           runDB $ delete pId
-          addMessageI Info MsgCourseDeregisterOk
+          addMessageIconI Info IconEnrolFalse MsgCourseDeregisterOk
           redirect $ CourseR tid ssh csh CUsersR
       | otherwise
         -> invalidArgs ["User not registered"]
@@ -1432,7 +1432,7 @@ postCUserR tid ssh csh uCId = do
       pId <- runDB . insertUnique $ CourseParticipant cid uid now primaryField
       case pId of
         Just _  -> do
-          addMessageI Success MsgCourseRegisterOk
+          addMessageIconI Success IconEnrolTrue MsgCourseRegisterOk
           redirect currentRoute
         Nothing -> invalidArgs ["User already registered"]