diff --git a/include/types/global.h b/include/types/global.h
index 304edf5..36bbb8e 100644
--- a/include/types/global.h
+++ b/include/types/global.h
@@ -248,6 +248,7 @@
 extern unsigned int rlim_fd_cur_at_boot;
 extern unsigned int rlim_fd_max_at_boot;
 extern int atexit_flag;
+extern unsigned char boot_seed[20];  // per-boot random seed (160 bits initially)
 
 /* bit values to go with "warned" above */
 #define WARN_BLOCK_DEPRECATED       0x00000001