--- base/allocator/dispatcher/tls.h.orig	2023-05-25 00:41:37 UTC
+++ base/allocator/dispatcher/tls.h
@@ -50,7 +50,7 @@ struct BASE_EXPORT MMapAllocator {
       partition_alloc::PartitionPageSize();
 #elif BUILDFLAG(IS_APPLE)
   constexpr static size_t AllocationChunkSize = 16384;
-#elif BUILDFLAG(IS_LINUX) && defined(ARCH_CPU_ARM64)
+#elif (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_BSD)) && defined(ARCH_CPU_ARM64)
   constexpr static size_t AllocationChunkSize = 16384;
 #else
   constexpr static size_t AllocationChunkSize = 4096;