diff --git a/lib/src/bulgarian/QuestionBul.gf b/lib/src/bulgarian/QuestionBul.gf
index 009cda5b4..0892fa2f5 100644
--- a/lib/src/bulgarian/QuestionBul.gf
+++ b/lib/src/bulgarian/QuestionBul.gf
@@ -59,7 +59,7 @@ concrete QuestionBul of Question = CatBul ** open ResBul, Prelude in {
       nonEmpty = num.nonEmpty
       } ;
 
-    AdvIAdv i a = {s = i.s ++ a.s} ;
+    AdvIAdv i a = {s = \\q => i.s ! q ++ a.s} ;
 
     CompIP ip = {s = ip.s ! RSubj} ;
 }