diff --git a/src/stable.rs b/src/stable.rs
index bea0180..1f2227c 100644
--- a/src/stable.rs
+++ b/src/stable.rs
@@ -824,6 +824,8 @@
         |
         tag!("i64") => { |_| () }
         |
+        tag!("i128") => { |_| () }
+        |
         tag!("usize") => { |_| () }
         |
         tag!("u8") => { |_| () }
@@ -834,6 +836,8 @@
         |
         tag!("u64") => { |_| () }
         |
+        tag!("u128") => { |_| () }
+        |
         epsilon!()
     ) >>
     (())