diff --git a/stdlib/tst-atexit-common.c b/stdlib/tst-atexit-common.c
index 4bea464b19..f77ccbbd0d 100644
--- a/stdlib/tst-atexit-common.c
+++ b/stdlib/tst-atexit-common.c
@@ -37,6 +37,7 @@ static char crumbs[sizeof (expected)];
 static int next_slot = 0;
 
 /* Helper: flush stdout and _exit.  */
+__attribute__ ((__noreturn__))
 static void
 _exit_with_flush (int code)
 {