diff --git a/lua/dial/command.lua b/lua/dial/command.lua
index dcdd620..03e3b55 100644
--- a/lua/dial/command.lua
+++ b/lua/dial/command.lua
@@ -41,12 +41,17 @@ end
 ---Select the most appropriate augend from given augend group (in VISUAL mode).
 ---@param group_name? string
 function M.select_augend_visual(group_name)
-    if group_name == nil and vim.v.register == "=" then
+    local augends
+    if group_name ~= nil then
+        augends = config.augends.group[group_name]
+    elseif vim.v.register == "=" then
         group_name = vim.fn.getreg("=", 1)
+        augends = config.augends.group[group_name]
+    elseif config.augends.filetype[vim.bo.filetype] ~= nil then
+        augends = config.augends.filetype[vim.bo.filetype]
     else
-        group_name = util.unwrap_or(group_name, "default")
+        augends = config.augends.group["default"]
     end
-    local augends = config.augends.group[group_name]
     if augends == nil then
         error(("undefined augend group name: %s"):format(group_name))
     end