diff --git a/dsl/src/dsl_macros.rs b/dsl/src/dsl_macros.rs
index b40f380..1aaa550 100644
--- a/dsl/src/dsl_macros.rs
+++ b/dsl/src/dsl_macros.rs
@@ -27,8 +27,8 @@ use crate::*;
 }
 
 #[macro_export] macro_rules! expose {
-    ($([$self:ident:$State:ty] $(($Type:ty $(: $(($pat:literal $expr:expr))*)?))*)*) => {
-        $(expose!(@impl [$self: $State] { $([$Type] => { $($($pat => $expr),*)? })* });)*
+    ($([$self:ident:$State:ty] $(([$($Type:tt)*] $(($pat:literal $expr:expr))*))*)*) => {
+        $(expose!(@impl [$self: $State] { $([$($Type)*] => { $($pat => $expr),* })* });)*
     };
     ($([$self:ident:$State:ty] { $([$($Type:tt)*] => { $($pat:pat => $expr:expr),* $(,)? })* })*) => {
         $(expose!(@impl [$self: $State] { $([$($Type)*] => { $($pat => $expr),* })* });)*