diff --git a/ndk/platforms/android-20/include/sys/epoll.h b/ndk/platforms/android-20/include/sys/epoll.h
index c06a081f0..4a5a37c56 100644
--- a/ndk/platforms/android-20/include/sys/epoll.h
+++ b/ndk/platforms/android-20/include/sys/epoll.h
@@ -67,7 +67,11 @@ typedef union epoll_data {
 struct epoll_event {
   uint32_t events;
   epoll_data_t data;
-};
+}
+#ifdef __x86_64__
+__packed
+#endif
+;
 
 int epoll_create(int);
 int epoll_create1(int);