diff --git a/selfhost/test/smoke.combined.ww b/selfhost/test/smoke.combined.ww
index 9780deda..2054f01b 100644
--- a/selfhost/test/smoke.combined.ww
+++ b/selfhost/test/smoke.combined.ww
@@ -748,6 +748,13 @@ def U16_MAX: u16 = 65535;
 def U32_MAX: u32 = 4294967295;
 def U64_MAX: u64 = 18446744073709551615;
 
+def U8_MIN:  u8  = 0;
+def U16_MIN: u16 = 0;
+def U32_MIN: u32 = 0;
+def U64_MIN: u64 = 0;
+
+def RUNE_MIN: rune = '\0';
+
 // bytes — slice operations over []u8. Mirrors Hare's bytes module
 // (ref/hare/bytes/) for the in-tree subset: search/equality/prefix
 // helpers used by lib/encoding, lib/bufio, lib/memio.