diff --git a/xo-expression/utest/type_unifier.test.cpp b/xo-expression/utest/type_unifier.test.cpp
index c670ae6b..e6e411c2 100644
--- a/xo-expression/utest/type_unifier.test.cpp
+++ b/xo-expression/utest/type_unifier.test.cpp
@@ -1,4 +1,4 @@
-/* @file expression.text.cppreference
+/* @file expression.text.cpp
  *
  * author: Roland Conybeare, Jul 2025
  */