diff --git a/lib/src/chinese/QuestionChi.gf b/lib/src/chinese/QuestionChi.gf
index a9d6deb77..7dac73416 100644
--- a/lib/src/chinese/QuestionChi.gf
+++ b/lib/src/chinese/QuestionChi.gf
@@ -16,7 +16,7 @@ concrete QuestionChi of Question = CatChi **
             APlain   => v.s  ++ v.neg ++ v.sn ; 
             APerf    => v.s  ++ neg_s ++ v.sn ++ v.pp ;
             ADurStat => v.s  ++ neg_s ++ v.sn ;
-            ADurProg => v.dp ++ v.neg ++ v.dp ++ v.sn ;  -- mei or bu
+            ADurProg => v.s  ++ v.neg ++ v.dp ++ v.sn ;  -- mei or bu
             AExper   => v.s  ++ v.neg ++ v.sn ++ v.ep
             }
           in