diff --git a/followingCalendar.py b/followingCalendar.py
index 214cde0cc..d4cb78d73 100644
--- a/followingCalendar.py
+++ b/followingCalendar.py
@@ -51,9 +51,9 @@ def _port_domain_remove(domain: str) -> str:
         if domain.startswith('did:'):
             return domain
         if ']:' not in domain:
-            domain = domain.split(':')[0]
+            if '[' not in domain:
+                domain = domain.split(':')[0]
         else:
-            # yggdrasil domain
             domain = domain.split(']:')[0] + ']'
     return domain