diff --git a/lang/src/parser.rs b/lang/src/parser.rs
index d5c523f..2d76b47 100644
--- a/lang/src/parser.rs
+++ b/lang/src/parser.rs
@@ -249,7 +249,10 @@ impl<'a, 'b> Parser<'a, 'b> {
             .enumerate()
             .rfind(|(_, elem)| self.lexer.slice(elem.ident.range()) == name)
         {
-            Some((i, elem)) => (i, elem, false),
+            Some((i, elem)) => {
+                elem.used = true;
+                (i, elem, false)
+            }
             None => {
                 let ident = match Ident::new(token.start, name.len() as _) {
                     None => {