diff --git a/search/median_search2.cpp b/search/median_search2.cpp
index 9e0ff956e..3657e90e4 100644
--- a/search/median_search2.cpp
+++ b/search/median_search2.cpp
@@ -123,6 +123,6 @@ static void test() {
  */
 int main()
 {
-	test();
+	test();  // run self-test implementations
 	return 0;
 }