diff --git a/src/comp/syntax/ast.rs b/src/comp/syntax/ast.rs
index 2537aa95f368..5c3ec015e5ad 100644
--- a/src/comp/syntax/ast.rs
+++ b/src/comp/syntax/ast.rs
@@ -273,8 +273,6 @@ type field_ = {mut: mutability, ident: ident, expr: @expr};
 
 type field = spanned<field_>;
 
-tag spawn_dom { dom_implicit; dom_thread; }
-
 tag check_mode { checked; unchecked; }
 
 // FIXME: temporary