diff --git a/test_main.c b/test_main.c
index a68f126..371594d 100644
--- a/test_main.c
+++ b/test_main.c
@@ -18,6 +18,7 @@
 #include "libvex_basictypes.h"
 #include "libvex.h"
 
+__attribute__ ((noreturn))
 void failure_exit ( void )
 {
    fprintf(stdout, "VEX did failure_exit.  Bye.\n");