diff --git a/pegleg/engine/site.py b/pegleg/engine/site.py
index ceb8b935..2268bd11 100644
--- a/pegleg/engine/site.py
+++ b/pegleg/engine/site.py
@@ -274,7 +274,7 @@ def _get_repo_deployment_data_stanza(repo_path):
         # If we're at a particular tag, reference it
         tag = [tag.name for tag in repo.tags if tag.commit == commit]
         if tag:
-            tag == ", ".join(tag)
+            tag = ", ".join(tag)
         else:
             # Otherwise just use the branch name
             try: