1 files changed, 3 insertions, 1 deletions
diff --git a/libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.guard/mutex.fail.cpp b/libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.guard/mutex.fail.cpp
index 52a0397de55..383c1539a60 100644
--- a/libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.guard/mutex.fail.cpp
+++ b/libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.guard/mutex.fail.cpp
@@ -16,8 +16,10 @@
 
 #include <mutex>
 
-int main()
+int main(int, char**)
 {
     std::mutex m;
     std::lock_guard<std::mutex> lg = m; // expected-error{{no viable conversion}}
+
+  return 0;
 }