diff --git a/check_shelly b/check_shelly
index c6738c5..6fea73b 100755
--- a/check_shelly
+++ b/check_shelly
@@ -19,6 +19,7 @@ FS_WARNING = .30
 #
 TMP_WARNING = 50
 TMP_ERROR = 57
+#
 
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(
@@ -79,6 +80,8 @@ if __name__ == "__main__":
     elif args.check == 'temperature':
         temperature = data.get('tmp', {}).get('tC')
         if temperature is None:
+            if args.hostname.startswith('shelly1-'):
+                n.exit(n.OK, "Shelly1 has no temperature information")
             status = n.UNKNOWN
         elif temperature >= TMP_ERROR:
             status = n.ERROR