diff --git a/compiler-rt/lib/msan/msan_allocator.cc b/compiler-rt/lib/msan/msan_allocator.cc
index 3d03ca42c8ce..36f0497a9d83 100644
--- a/compiler-rt/lib/msan/msan_allocator.cc
+++ b/compiler-rt/lib/msan/msan_allocator.cc
@@ -120,7 +120,7 @@ typedef CombinedAllocator<PrimaryAllocator, AllocatorCache,
 
 static Allocator allocator;
 static AllocatorCache fallback_allocator_cache;
-static SpinMutex fallback_mutex;
+static StaticSpinMutex fallback_mutex;
 
 void MsanAllocatorInit() {
   SetAllocatorMayReturnNull(common_flags()->allocator_may_return_null);