diff --git a/runtime/atomic.cc b/runtime/atomic.cc
index 63f2cf8..e766a8d 100644
--- a/runtime/atomic.cc
+++ b/runtime/atomic.cc
@@ -31,7 +31,7 @@
   if (kNeedSwapMutexes) {
     gSwapMutexes = new std::vector<Mutex*>;
     for (size_t i = 0; i < kSwapMutexCount; ++i) {
-      gSwapMutexes->push_back(new Mutex("QuasiAtomic stripe"));
+      gSwapMutexes->push_back(new Mutex("QuasiAtomic stripe", kSwapMutexesLock));
     }
   }
 }