diff --git a/src/DynareBison.yy b/src/DynareBison.yy
index a4e1ab12d239242c12ad6ddf10a9b71e93f742fa..d96b49d023e2360ce125729458c448a9f1ecab84 100644
--- a/src/DynareBison.yy
+++ b/src/DynareBison.yy
@@ -3899,6 +3899,8 @@ symbol : NAME
          { $$ = $1; }
        | PRIOR
          { $$ = $1; }
+       | EXPECTATION
+         {  }
        ;