diff --git a/libc/include/errno.h b/libc/include/errno.h
index d286aae3..32f6587a 100644
--- a/libc/include/errno.h
+++ b/libc/include/errno.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011-2016, 2020 Jonas 'Sortie' Termansen.
+ * Copyright (c) 2011-2016, 2020-2022 Jonas 'Sortie' Termansen.
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -108,6 +108,7 @@
 #define ETXTBSY 98
 #define ENOMOUNT 99
 #define ENOMEDIUM 100
+#define EHOSTDOWN 101
 
 #define EOPNOTSUPP ENOTSUP
 #define EWOULDBLOCK EAGAIN
diff --git a/libc/string/strerror.c b/libc/string/strerror.c
index 39df8060..90071782 100644
--- a/libc/string/strerror.c
+++ b/libc/string/strerror.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, 2012, 2013, 2014 Jonas 'Sortie' Termansen.
+ * Copyright (c) 2011-2016, 2020-2022 Jonas 'Sortie' Termansen.
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -111,6 +111,7 @@ const char* sortix_strerror(int errnum)
 	case ETXTBSY: return "Text file busy";
 	case ENOMOUNT: return "No such mountpoint";
 	case ENOMEDIUM: return "No medium found";
+	case EHOSTDOWN: return "Host is down";
 	default: return "Unknown error condition";
 	}
 }