diff --git a/libc/bionic/libc_init_static.cpp b/libc/bionic/libc_init_static.cpp
index 10fc151..f2168b8 100644
--- a/libc/bionic/libc_init_static.cpp
+++ b/libc/bionic/libc_init_static.cpp
@@ -153,6 +153,8 @@
 }
 
 __LIBC_HIDDEN__ libc_shared_globals* __libc_shared_globals() {
-  static libc_shared_globals globals;
+  static libc_shared_globals globals = {
+    .abort_msg_lock = PTHREAD_MUTEX_INITIALIZER,
+  };
   return &globals;
 }