diff --git a/libc/include/sys/user.h b/libc/include/sys/user.h
index f9ad956..ed3e10a 100644
--- a/libc/include/sys/user.h
+++ b/libc/include/sys/user.h
@@ -102,6 +102,10 @@
   int u_debugreg[8];
 };
 
+#define UPAGES 1
+#define HOST_TEXT_START_ADDR (u.start_code)
+#define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * PAGE_SIZE)
+
 #elif defined(__x86_64__)
 
 struct user_fpregs_struct {