Index: lib/builtins/emutls.c
===================================================================
--- lib/builtins/emutls.c
+++ lib/builtins/emutls.c
@@ -390,3 +390,10 @@
         array->data[index] = emutls_allocate_object(control);
     return array->data[index];
 }
+
+#ifdef __BIONIC__
+__attribute__((visibility("hidden")))
+void __emutls_unregister_key(void) {
+    pthread_key_delete(emutls_pthread_key);
+}
+#endif