1 files changed, 1 insertions, 1 deletions
diff --git a/parser.c b/parser.c
index 4aa9fdeb..4f4bcdae 100644
--- a/parser.c
+++ b/parser.c
@@ -173,7 +173,7 @@ static val ensure_parser(val stream)
   val pars = cdr(cell);
   if (pars)
     return pars;
-  return set(cdr_l(cell), parser(stream, one));
+  return sys_rplacd(cell, parser(stream, one));
 }
 
 static void pushback_token(parser_t *p, struct yy_token *tok)