diff --git a/include/_tail_cc/setjmp.h b/include/_tail_cc/setjmp.h
index 93039535..61f93b57 100644
--- a/include/_tail_cc/setjmp.h
+++ b/include/_tail_cc/setjmp.h
@@ -1 +1 @@
-typedef char *jmp_buf[3];
+typedef char jmp_buf[256];