1 files changed, 3 insertions, 1 deletions
diff --git a/libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.guard/assign.fail.cpp b/libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.guard/assign.fail.cpp
index b22e0db9efd..2d0f438ed03 100644
--- a/libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.guard/assign.fail.cpp
+++ b/libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.guard/assign.fail.cpp
@@ -14,11 +14,13 @@
 
 #include <mutex>
 
-int main()
+int main(int, char**)
 {
     std::mutex m0;
     std::mutex m1;
     std::lock_guard<std::mutex> lg0(m0);
     std::lock_guard<std::mutex> lg(m1);
     lg = lg0;
+
+  return 0;
 }