diff --git a/libc/bionic/exit.cpp b/libc/bionic/exit.cpp
index a5aed78..8eda5b2 100644
--- a/libc/bionic/exit.cpp
+++ b/libc/bionic/exit.cpp
@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <pthread.h>
 #include <stdlib.h>
 #include <unistd.h>
 
@@ -34,8 +35,13 @@
 extern "C" void __cxa_finalize(void* dso_handle);
 extern "C" void __cxa_thread_finalize();
 
+static pthread_mutex_t g_exit_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
+
 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
 void exit(int status) {
+  // https://austingroupbugs.net/view.php?id=1845
+  pthread_mutex_lock(&g_exit_mutex);
+
   __cxa_thread_finalize();
   __cxa_finalize(nullptr);
   _exit(status);