diff --git a/src/lib.rs b/src/lib.rs
index 734744e..b7dd21a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -188,8 +188,8 @@
     }
 
     int_literals! {
-        u8, u16, u32, u64, /*usize*/
-        i8, i16, i32, i64, /*isize,*/
+        u8, u16, u32, u64, usize,
+        i8, i16, i32, i64, isize,
     }
 
     pub fn float(f: f64) -> Literal {