--- a/base/allocator/partition_allocator/partition_root.cc
+++ b/base/allocator/partition_allocator/partition_root.cc
@@ -239,7 +239,7 @@
   if (!g_global_init_called.compare_exchange_strong(expected, true))
     return;
 
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
+#if (BUILDFLAG(IS_LINUX) && defined(__GLIBC__)) || BUILDFLAG(IS_CHROMEOS)
   // When fork() is called, only the current thread continues to execute in the
   // child process. If the lock is held, but *not* by this thread when fork() is
   // called, we have a deadlock.