diff --git a/lua/astrocommunity/pack/bash/init.lua b/lua/astrocommunity/pack/bash/init.lua
index edf1b11dc..f174b0158 100644
--- a/lua/astrocommunity/pack/bash/init.lua
+++ b/lua/astrocommunity/pack/bash/init.lua
@@ -46,6 +46,21 @@ return {
       formatters_by_ft = {
         sh = { "shfmt" },
       },
+      formatters = {
+        shfmt = {
+          prepend_args = function(_, ctx)
+            local args = {}
+            local bo = vim.bo[ctx.buf]
+            if bo.expandtab then
+              local tab_size = bo.tabstop or 2
+              local indent_size = bo.shiftwidth
+              if indent_size == 0 or not indent_size then indent_size = tab_size end
+              vim.list_extend(args, { "-i", tostring(indent_size) })
+            end
+            return args
+          end,
+        },
+      },
     },
   },
   {