1 files changed, 4 insertions, 2 deletions
diff --git a/lib/scudo/scudo_allocator.h b/lib/scudo/scudo_allocator.h
index 6431a2aa07d7..5f5225b36286 100644
--- a/lib/scudo/scudo_allocator.h
+++ b/lib/scudo/scudo_allocator.h
@@ -18,7 +18,9 @@
 
 #include "sanitizer_common/sanitizer_allocator.h"
 
-#include <atomic>
+#if !SANITIZER_LINUX
+# error "The Scudo hardened allocator is currently only supported on Linux."
+#endif
 
 namespace __scudo {
 
@@ -54,7 +56,7 @@ struct UnpackedHeader {
   u64 Salt        : 8;
 };
 
-typedef std::atomic<PackedHeader> AtomicPackedHeader;
+typedef atomic_uint64_t AtomicPackedHeader;
 COMPILER_CHECK(sizeof(UnpackedHeader) == sizeof(PackedHeader));
 
 // Minimum alignment of 8 bytes for 32-bit, 16 for 64-bit