diff --git a/src/DynareBison.yy b/src/DynareBison.yy
index a4e1ab12..d96b49d0 100644
--- a/src/DynareBison.yy
+++ b/src/DynareBison.yy
@@ -3899,6 +3899,8 @@ symbol : NAME
          { $$ = $1; }
        | PRIOR
          { $$ = $1; }
+       | EXPECTATION
+         {  }
        ;