diff --git a/libc/bionic/pthread_internal.h b/libc/bionic/pthread_internal.h
index 7efbf6d..3b9e6a4 100644
--- a/libc/bionic/pthread_internal.h
+++ b/libc/bionic/pthread_internal.h
@@ -38,6 +38,8 @@
 #define __hwasan_thread_exit()
 #endif
 
+#include "platform/bionic/page.h"
+
 #include "private/bionic_elf_tls.h"
 #include "private/bionic_lock.h"
 #include "private/bionic_tls.h"
@@ -236,7 +238,7 @@
 // On LP64, we could use more but there's no obvious advantage to doing
 // so, and the various media processes use RLIMIT_AS as a way to limit
 // the amount of allocation they'll do.
-#define PTHREAD_GUARD_SIZE PAGE_SIZE
+#define PTHREAD_GUARD_SIZE max_page_size()
 
 // SIGSTKSZ (8KiB) is not big enough.
 // An snprintf to a stack buffer of size PATH_MAX consumes ~7KiB of stack.