diff --git a/parse.y b/parse.y
index 90a14f35e2..07ad847b4e 100644
--- a/parse.y
+++ b/parse.y
@@ -8966,7 +8966,7 @@ new_args_gen(struct parser_params *parser, NODE *m, NODE *o, ID r, NODE *p, ID b
 }
 #endif /* !RIPPER */
 
-#define LVAR_USED ((ID)1 << (sizeof(ID) * CHAR_BIT - 1))
+#define LVAR_USED ((int)1 << (sizeof(int) * CHAR_BIT - 1))
 
 static void
 warn_unused_var(struct parser_params *parser, struct vtable *tbl)