1 files changed, 9 insertions, 1 deletions

diff --git a/src/regress/lib/libc/atexit/atexit_test.c b/src/regress/lib/libc/atexit/atexit_test.c
index b060a9b341..f00a81a6c9 100644
--- a/src/regress/lib/libc/atexit/atexit_test.c
+++ b/src/regress/lib/libc/atexit/atexit_test.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: atexit_test.c,v 1.9 2017/07/27 15:08:37 bluhm Exp $ */
+/*      $OpenBSD: atexit_test.c,v 1.10 2024/03/05 19:27:47 miod Exp $ */
 
 /*
  * Copyright (c) 2002 Daniel Hartmeier
@@ -40,6 +40,14 @@
 #include <signal.h>
 #include <unistd.h>
 
+/*
+ * XXX Provide a prototype for aligned_alloc on pre-C11 compilers to prevent
+ * inclusion of hidden/stdlib.h below to cause a missing prototype error.
+ */
+#if (__ISO_C_VISIBLE - 0) < 2011
+void *aligned_alloc(size_t, size_t);
+#endif
+
 #include "include/namespace.h"
 #include "hidden/stdlib.h"
 #include "stdlib/atexit.h"