diff --git a/src/spec.rs b/src/spec.rs
index cdeb0428..3726a58f 100644
--- a/src/spec.rs
+++ b/src/spec.rs
@@ -169,9 +169,6 @@ macro_rules! to_le {
     ($obj:ident, $field:ident, $type:ty) => {
         $obj.$field = <$type>::to_le($obj.$field);
     };
-    ($obj:ident, [($field:ident, $type:ty) $(,)?]) => {
-        to_le![$obj, $field, $type];
-    };
     ($obj:ident, [($field:ident, $type:ty), $($rest:tt),+ $(,)?]) => {
         to_le![$obj, $field, $type];
         to_le!($obj, [$($rest),+]);