diff --git a/lib/linkify/parser.ex b/lib/linkify/parser.ex
index 1e5c3db..eab5891 100644
--- a/lib/linkify/parser.ex
+++ b/lib/linkify/parser.ex
@@ -15,7 +15,7 @@ defmodule Linkify.Parser do
 
   # @user
   # @user@example.com
-  @match_mention ~r"^@[a-zA-Z\d_-]+@[a-zA-Z0-9_-](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*|@[a-zA-Z\d_-]+"u
+  @match_mention ~r"^@[a-zA-Z\d_-]+@[a-zA-Z0-9_-](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*|^@[a-zA-Z\d_-]+"u
 
   # https://www.w3.org/TR/html5/forms.html#valid-e-mail-address
   @match_email ~r"^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$"u
diff --git a/test/linkify_test.exs b/test/linkify_test.exs
index b5059f6..a18dc3c 100644
--- a/test/linkify_test.exs
+++ b/test/linkify_test.exs
@@ -385,6 +385,12 @@ defmodule LinkifyTest do
                mention_prefix: "https://example.com/user/"
              ) == expected
     end
+
+    test "invalid mentions" do
+      text = "hey user@example"
+
+      assert Linkify.link(text, mention: true, mention_prefix: "/users/") == text
+    end
   end
 
   describe "hashtag links" do