diff --git a/bodhi-server/bodhi/server/__init__.py b/bodhi-server/bodhi/server/__init__.py
index 77d20c9b9a..5b76da8e5d 100644
--- a/bodhi-server/bodhi/server/__init__.py
+++ b/bodhi-server/bodhi/server/__init__.py
@@ -41,7 +41,7 @@
 
 
 # This is a regular expression used to match username mentions in comments.
-MENTION_RE = r'(?<!\S)(@\w+)'
+MENTION_RE = r'(?<!\S)(@[\w-]+)'
 
 log = python_logging.getLogger(__name__)
 
diff --git a/news/5453.bug b/news/5453.bug
new file mode 100644
index 0000000000..57fdff484a
--- /dev/null
+++ b/news/5453.bug
@@ -0,0 +1 @@
+Usernames containing a `-` are now correctly matched when mentioning