diff --git a/src/IRCLine.py b/src/IRCLine.py
index 6bd50e75..e22a79ad 100644
--- a/src/IRCLine.py
+++ b/src/IRCLine.py
@@ -62,7 +62,7 @@ class ParsedLine(object):
                 tag_pieces.append(tag)
 
         if tag_pieces:
-            return "@%s" % ",".join(tag_pieces)
+            return "@%s" % ";".join(tag_pieces)
         return ""
 
     def format(self) -> str: