1 files changed, 4 insertions, 2 deletions
diff --git a/modern/src/main/MainToolbar.js b/modern/src/main/MainToolbar.js
index 859aa218..caba2410 100644
--- a/modern/src/main/MainToolbar.js
+++ b/modern/src/main/MainToolbar.js
@@ -2,7 +2,7 @@ import React, { useState, useRef } from 'react';
 import { useSelector } from 'react-redux';
 import { useNavigate } from 'react-router-dom';
 import {
-  Toolbar, IconButton, OutlinedInput, InputAdornment, Popover, FormControl, InputLabel, Select, MenuItem, FormGroup, FormControlLabel, Checkbox, Badge, ListItemButton, ListItemText,
+  Toolbar, IconButton, OutlinedInput, InputAdornment, Popover, FormControl, InputLabel, Select, MenuItem, FormGroup, FormControlLabel, Checkbox, Badge, ListItemButton, ListItemText, Tooltip,
 } from '@mui/material';
 import { makeStyles, useTheme } from '@mui/styles';
 import MapIcon from '@mui/icons-material/Map';
@@ -167,7 +167,9 @@ const MainToolbar = ({
         </div>
       </Popover>
       <IconButton edge="end" onClick={() => navigate('/settings/device')} disabled={deviceReadonly}>
-        <AddIcon />
+        <Tooltip open={Object.keys(devices).length === 0} title={t('deviceRegisterFirst')} arrow>
+          <AddIcon />
+        </Tooltip>
       </IconButton>
     </Toolbar>
   );