--- base/threading/platform_thread.h.orig	2026-03-13 16:54:03 UTC
+++ base/threading/platform_thread.h
@@ -61,6 +61,8 @@ class BASE_EXPORT PlatformThreadId {
   using UnderlyingType = zx_koid_t;
 #elif BUILDFLAG(IS_APPLE)
   using UnderlyingType = uint64_t;
+#elif BUILDFLAG(IS_BSD)
+  using UnderlyingType = uint64_t;
 #elif BUILDFLAG(IS_POSIX)
   using UnderlyingType = pid_t;
 #endif