diff --git a/R/bucket_list.R b/R/bucket_list.R
index 2d6f2c6..790e99c 100644
--- a/R/bucket_list.R
+++ b/R/bucket_list.R
@@ -121,7 +121,7 @@ bucket_list <- function(
       dot,
       val = list(
         options = sortable_options(group = group_name),
-        class = paste(class, paste0("column_", i))
+        class = paste(class, paste0("column_", i),dot$class)
       )
     )
   })