diff --git a/runtime/base/mutex.cc b/runtime/base/mutex.cc
index d2b4e01..11698e2 100644
--- a/runtime/base/mutex.cc
+++ b/runtime/base/mutex.cc
@@ -35,6 +35,7 @@
 ReaderWriterMutex* Locks::classlinker_classes_lock_ = nullptr;
 ReaderWriterMutex* Locks::heap_bitmap_lock_ = nullptr;
 Mutex* Locks::logging_lock_ = nullptr;
+Mutex* Locks::mem_maps_lock_ = nullptr;
 Mutex* Locks::modify_ldt_lock_ = nullptr;
 ReaderWriterMutex* Locks::mutator_lock_ = nullptr;
 Mutex* Locks::runtime_shutdown_lock_ = nullptr;
@@ -900,6 +901,10 @@
     DCHECK(unexpected_signal_lock_ == nullptr);
     unexpected_signal_lock_ = new Mutex("unexpected signal lock", current_lock_level, true);
 
+    UPDATE_CURRENT_LOCK_LEVEL(kMemMapsLock);
+    DCHECK(mem_maps_lock_ == nullptr);
+    mem_maps_lock_ = new Mutex("mem maps lock", current_lock_level);
+
     UPDATE_CURRENT_LOCK_LEVEL(kLoggingLock);
     DCHECK(logging_lock_ == nullptr);
     logging_lock_ = new Mutex("logging lock", current_lock_level, true);