diff --git a/src/arch.rs b/src/arch.rs
index 9ee51594..80a71459 100644
--- a/src/arch.rs
+++ b/src/arch.rs
@@ -581,6 +581,9 @@ registers!(MIPS, {
     F29 = (61, "$f29"),
     F30 = (62, "$f30"),
     F31 = (63, "$f31"),
+
+    HI = (64, "hi"),
+    LO = (65, "lo"),
 },
 aliases {
     ZERO = (0, "$zero"),