diff --git a/libc/bionic/__libc_init_main_thread.cpp b/libc/bionic/__libc_init_main_thread.cpp
index 9cbff11..d7581dd 100644
--- a/libc/bionic/__libc_init_main_thread.cpp
+++ b/libc/bionic/__libc_init_main_thread.cpp
@@ -31,6 +31,7 @@
 #include "private/KernelArgumentBlock.h"
 #include "private/bionic_arc4random.h"
 #include "private/bionic_auxv.h"
+#include "private/bionic_defs.h"
 #include "private/bionic_globals.h"
 #include "private/bionic_ssp.h"
 #include "pthread_internal.h"
@@ -58,6 +59,7 @@
 // -fno-stack-protector because it's responsible for setting up the main
 // thread's TLS (which stack protector relies on).
 
+__BIONIC_WEAK_FOR_NATIVE_BRIDGE
 void __libc_init_main_thread(KernelArgumentBlock& args) {
   __libc_auxv = args.auxv;
 #if defined(__i386__)
diff --git a/libc/bionic/android_set_abort_message.cpp b/libc/bionic/android_set_abort_message.cpp
index 8c80c5a..268c4f3 100644
--- a/libc/bionic/android_set_abort_message.cpp
+++ b/libc/bionic/android_set_abort_message.cpp
@@ -32,6 +32,7 @@
 #include <string.h>
 #include <sys/mman.h>
 
+#include "private/bionic_defs.h"
 #include "private/ScopedPthreadMutexLocker.h"
 
 static pthread_mutex_t g_abort_msg_lock = PTHREAD_MUTEX_INITIALIZER;
@@ -43,6 +44,7 @@
 
 abort_msg_t** __abort_message_ptr; // Accessible to __libc_init_common.
 
+__BIONIC_WEAK_FOR_NATIVE_BRIDGE
 void android_set_abort_message(const char* msg) {
   ScopedPthreadMutexLocker locker(&g_abort_msg_lock);