diff --git a/lib/resource-1.4/bulgarian/RelativeBul.gf b/lib/resource-1.4/bulgarian/RelativeBul.gf
index 8c1fddd8f..4bdcd7faa 100644
--- a/lib/resource-1.4/bulgarian/RelativeBul.gf
+++ b/lib/resource-1.4/bulgarian/RelativeBul.gf
@@ -23,7 +23,7 @@ concrete RelativeBul of Relative = CatBul ** open ResBul in {
       } ;
 
     FunRP p np rp = {
-      s = \\gn => np.s ! RObj Acc ++ p.s ++ rp.s ! gn ;
+      s = \\gn => np.s ! RObj Acc ++ p.s ++ (case p.c of {Acc => []; Dat => "на"}) ++ rp.s ! gn ;
       } ;
 
     IdRP = {