diff --git a/syntax/tokens.rs b/syntax/tokens.rs
index e97509b..4ddc1a6 100644
--- a/syntax/tokens.rs
+++ b/syntax/tokens.rs
@@ -16,6 +16,7 @@
             }
             Type::RustBox(ty) | Type::UniquePtr(ty) => ty.to_tokens(tokens),
             Type::Ref(r) | Type::Str(r) => r.to_tokens(tokens),
+            Type::Void(span) => tokens.extend(quote_spanned!(span.0=> ())),
         }
     }
 }