diff --git a/src/unistd/_exit.c b/src/unistd/_exit.c
index 1fbebbd..ee04981 100644
--- a/src/unistd/_exit.c
+++ b/src/unistd/_exit.c
@@ -1,6 +1,7 @@
 #include <unistd.h>
 
 /* Exit immediately, bypassing exit handlers or signal handlers. */
+__attribute__((noreturn))
 extern void _Exit(int status);
 
 /* Alias to _Exit. */