diff --git a/irctokens/formatting.py b/irctokens/formatting.py
index a38c599..b43e6b0 100644
--- a/irctokens/formatting.py
+++ b/irctokens/formatting.py
@@ -16,7 +16,7 @@ def format(
         tags_str = []
         for key in sorted(tags.keys()):
             if tags[key]:
-                value = tags[key] or ""
+                value = tags[key]
                 tags_str.append(f"{key}={_escape_tag(value)}")
             else:
                 tags_str.append(key)