1 files changed, 3 insertions, 1 deletions
diff --git a/runtime/base/mutex-inl.h b/runtime/base/mutex-inl.h
index 22b76d231b..821c75d9b3 100644
--- a/runtime/base/mutex-inl.h
+++ b/runtime/base/mutex-inl.h
@@ -82,7 +82,9 @@ static inline void CheckUnattachedThread(LockLevel level) NO_THREAD_SAFETY_ANALY
           // Avoid recursive death.
           level == kAbortLock ||
           // Locks at the absolute top of the stack can be locked at any time.
-          level == kTopLockLevel) << level;
+          level == kTopLockLevel ||
+          // The unexpected signal handler may be catching signals from any thread.
+          level == kUnexpectedSignalLock) << level;
   }
 }